I believe I'm having the same issue with the 64 bit installation on a windows 7 platform. When I boot MultiCommander, the program runs fine and then after using it a bit to move some files nad folders around and building directories, the functionality seems to disappear. The problem started a few days ago after months of perfect performance. I noticed the issue, and updated to the latest build but the problem persisted. I then did a clean install of the latest 64 bit build form the website. The program is responsive but none of the hotkeys work. (F7 for a new dir, F2 to rename, etc.) and performance seems sluggish.
Furthermore, the buttons under the menu toolbar only animate to 'press down' when I click on them and they have to be clicked again to not appear to be pressed (Specifically the button to copy the file path directory). And the button labels in the 'Button window' seem to be hidden.
I attached a screenshot of whats happening to the buttons. Is it some kind of memory issue? Every other aspect of my computer seems fine so I think its an issue with Multi Commander itself. And I have no custom scripts or any kind of background process running either.
Should also mention that I can't exit thre program easily; I have to force a shutdown through the task manager and this takes a while to execute.