Thank you for the reply.
I actually do as you suggest, but it does not work.
Updating Multi Commander Located in : "C:\Users\username\AppData\Local\MultiCommander (X64)"
=============================================================
You are running on a 64 bit platform.
==================================================
Make sure you do not already have Multi Commander running.
==================================================
Press start to begin update process.
Checking if newer version exists.
Downloading : 
http://multicommander.com/updates/version.xmlVersion information received.
Current installed version is 12.1.0.2906
==> Forcing update.
Downloading update for Multi Commander...
Downloading : 
http://multicommander.com/files/updates/MultiCommander_x64_Update_(12.1.0.2906).zipDownloaded completed...
Saving update file to : "C:\Users\username\AppData\Local\Temp\MUTemp\MultiCommander_x64_Update_(12.1.0.2906).zip".
Unpacking Multi Commander Update...
Create folder : "C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632".
Unzip update into into "C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632".
Remove temporary file : "MultiCommander_x64_Update_(12.1.0.2906).zip"
Updating Multi Commander...
Updating to version 12.1.0.2906
Set "PORTABLE" = "0"
Copy : "MultiCommander.exe"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\MultiCommander.exe"
Copy : "MCIcons.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\MCIcons.dll"
XCopy: "Languages\MC_LangPack_*.zip" --> "C:\Users\username\AppData\Local\MultiCommander (X64)\Languages"
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_bg.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_bg.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_cn.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_cn.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_cz.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_cz.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_de.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_de.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_en.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_en.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_es.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_es.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_fr.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_fr.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_hu.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_hu.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_it.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_it.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_jp.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_jp.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_ko.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_ko.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_lt.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_lt.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_nl.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_nl.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_no.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_no.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_pl.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_pl.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_pt-BR.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_pt-BR.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_pt.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_pt.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_ro.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_ro.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_ru.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_ru.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_se.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_se.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_sl-SI.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_sl-SI.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_tr.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_tr.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_tw.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_tw.zip
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Languages\MC_LangPack_uk.zip -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Languages\MC_LangPack_uk.zip
Copy : "Config\SupportedLanguages.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\SupportedLanguages.xml"
Copy : "Config\DataPreviewTemplates_tpl.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\DataPreviewTemplates_tpl.xml"
Copy : "Config\MultiCrashReport.ini"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\MultiCrashReport.ini"
Copy : "Config\ConfigProfiles.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\ConfigProfiles.xml"
XCopy: "Config\CfgProfiles\*.xml" --> "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles"
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-Color-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-Color-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-Color-MultiCommander.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-Color-MultiCommander.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-ColorAlternating-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-ColorAlternating-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-ColorAlternating-MultiCommander.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-ColorAlternating-MultiCommander.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-ColorDarkMode-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-ColorDarkMode-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-ColorDarkMode-MultiCommander.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-ColorDarkMode-MultiCommander.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-ColorNC-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-ColorNC-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-ColorNC-MultiCommander.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-ColorNC-MultiCommander.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-Dark-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-Dark-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-Dark-MultiCommander.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-Dark-MultiCommander.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-Keyboard-CustomKeymappings.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-Keyboard-CustomKeymappings.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-Keyboard-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-Keyboard-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-Mouse-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-Mouse-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\CommanderStyle-Overall-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\CommanderStyle-Overall-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\WindowsExplorer-Color-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\WindowsExplorer-Color-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\WindowsExplorer-Color-MultiCommander.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\WindowsExplorer-Color-MultiCommander.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\WindowsExplorer-ColorDarkMode-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\WindowsExplorer-ColorDarkMode-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\WindowsExplorer-ColorDarkMode-MultiCommander.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\WindowsExplorer-ColorDarkMode-MultiCommander.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\WindowsExplorer-Keyboard-CustomKeymappings.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\WindowsExplorer-Keyboard-CustomKeymappings.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\WindowsExplorer-Keyboard-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\WindowsExplorer-Keyboard-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\WindowsExplorer-Mouse-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\WindowsExplorer-Mouse-ExplorerPanel.xml
   Copying  C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632\Config\CfgProfiles\WindowsExplorer-Overall-ExplorerPanel.xml -->  C:\Users\username\AppData\Local\MultiCommander (X64)\Config\CfgProfiles\WindowsExplorer-Overall-ExplorerPanel.xml
Copy : "Config\Scripts\Examples\Examples.zip"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\Scripts\Examples\Examples.zip"
Copy : "Config\MultiCommander_def.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\MultiCommander_def.xml"
Copy : "Config\ExplorerPanel_def.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\ExplorerPanel_def.xml"
Copy : "Config\FSLocal_def.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\FSLocal_def.xml"
Copy : "Config\FSZip_def.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\FSZip_def.xml"
Copy : "Extensions\FSRAR\FSRAR.DLL"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FSRAR\FSRAR.DLL"
Copy : "Extensions\MultiFileViewer\MultiFileViewer.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MultiFileViewer\MultiFileViewer.dll"
Copy : "Extensions\MFTools\MFTools.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MFTools\MFTools.dll"
Copy : "Extensions\MCUtils\MCUtils.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MCUtils\MCUtils.dll"
Copy : "Extensions\MCPictureTools\MCPictureTools.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MCPictureTools\MCPictureTools.dll"
Copy : "Extensions\MCPictureTools\ExifWin.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MCPictureTools\ExifWin.dll"
Copy : "Extensions\MCAudioTools\MCAudioTools.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MCAudioTools\MCAudioTools.dll"
Copy : "Extensions\MCVideoTools\MCVideoTools.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MCVideoTools\MCVideoTools.dll"
Copy : "Extensions\MCSpecial\MCSpecial.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MCSpecial\MCSpecial.dll"
Copy : "Extensions\MCLanEditor\MCLanEditor.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MCLanEditor\MCLanEditor.dll"
Copy : "Extensions\FSRegistry\FSRegistry.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FSRegistry\FSRegistry.dll"
Copy : "Extensions\FSFTP\FSFTP.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FSFTP\FSFTP.dll"
Copy : "Extensions\FS7Zip\7za.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FS7Zip\7za.dll"
Failed to replace C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FS7Zip\7za.dll, file not found. Expected result. Ignoring error.
Copy : "Extensions\FS7Zip\7za_x64.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FS7Zip\7za_x64.dll"
Copy : "Extensions\FS7Zip\FS7Zip.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FS7Zip\FS7Zip.dll"
Copy : "Extensions\FSPortable\FSPortable.dll"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FSPortable\FSPortable.dll"
Copy : "Extensions\FSPortable\FSPortable_def.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FSPortable\FSPortable_def.xml"
Copy : "Config\MultiButtons.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\MultiButtons.xml"
Copy : "Config\Aliases.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\Aliases.xml"
Copy : "Config\ColorRules.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\ColorRules.xml"
Copy : "Config\FileOpPluginProfiles.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\FileOpPluginProfiles.xml"
Copy : "Config\SupportedLanguages.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Config\SupportedLanguages.xml"
Copy : "Extensions\MultiFileViewer\MultiFileViewer.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MultiFileViewer\MultiFileViewer.xml"
Copy : "Extensions\MultiFileViewer\ColorFormatting.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\MultiFileViewer\ColorFormatting.xml"
Copy : "Extensions\FSFTP\FSFTP.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FSFTP\FSFTP.xml"
Copy : "Extensions\FSPortable\FSPortable.xml"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\Extensions\FSPortable\FSPortable.xml"
Copy : "ChangeLog.txt"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\ChangeLog.txt"
Copy : "MCAdmin.exe"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\MCAdmin.exe"
Copy : "MultiCrashReport.exe"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\MultiCrashReport.exe"
Copy : "MultiUpdate2.exe"  ->  "C:\Users\username\AppData\Local\MultiCommander (X64)\MultiUpdate2.exe"
******************************************************************
** Update complete **
******************************************************************
To see what has changed go to 
http://multicommander.com/release/multicommander/changelogRemove directory : "C:\Users\username\AppData\Local\Temp\MUTemp\Multi Commander4632"
Finished...