After the latest update, v11.2 (build 2795), I noticed exclamation points (!) before each tab's name until I click on that tab.
I cannot find what this means in the forum or documentation. I've attached a screenshot.
I use a custom INI to load specific tabs which are locked. Here is my shortcut target... C:\Programs\MultiCommander (x64)\MultiCommander.exe" -F="C:\Users\RandyJSwearengin\AppData\Roaming\MultiCommander\UserData\Randys_tabs.ini" -AutoRun="ChangeSplitSize