I unchecked this option and haven't had the problem anymore 
Use multiple threads/cores when starting up (Faster startup)

Use multiple threads/cores when starting up (Faster startup)
MultiCommander v16.6 is released!
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QuoteFIXED - TabSessionManager will now make sure menu system is loaded before loading the tab session. (Since this should be added to menu system)If this is related to the topic of this thread, I'm sorry to say that the issue still persists

