I downloaded the 64-bit donor version yesterday. After installation, it works for a while. However, after I closed the window, it could never be launched again.
Steps to reproduce:
1) Browse into "C:\Program Files\FreeCommander XE"
2) Double clicks on "FreeCommander.exe"
Then I have an error dialog
The application was unable to start correctly(0xc000007b). Click OK to close the application.
Screen shot below:

Regards,
Gin