I've just noticed that ZA is no longer backing up my selected files every night like it used to do. In fact, the Backup icon doen't show in tray anymore, and when I try to start it manually from the Start menu, it says it can not find any of the .exe files (i.e. ZABackupTray.exe).

I tried to reset it with the Ctrl-Shift method, but it still was not working at next startup...

Any Idea? Did I loose all my previous backed up files?