Now it's OK. There was a problem, that muCommander was running (icon on tray was visible) but there was not any chance to force window to appear. Now it's OK. It's a pitty, that my patch
can't be applied. I'm sorry to say that, but "Run command" feature is maybe enought for Mac users, but for Linux users not (internat terminal emulator is quite poor for any serious work). Thank you for your great project.