clicking sound bug

Since I installed Weather Watcher 5.5 I’ve had problems with the mouse clicking sound, using the Internet Explorer, Windows Explorer, etc and I couldn’t enable it again - I’ve got no more sound.
I uninstalled the program and cleaned the register but it didn’t work. How can I enable it again ? In Control Panel ?
In the Weather Watcher options menu there’s an option “disable IE clicking sound” and the default position is marked. I think the bug is there…