It is possible open start menu folders in dopus?
Now when dopus replaces explorer it does nothing: (right click->open or just double click on any folder in start menu).
It works here. I use this a lot!
Might be worth a try to turn off Explorer Replacement mode in Preferences, press Apply, then turn it on again and press Apply again. That should repair any registry settings which may have been changed by something else for some reason.
If it still doesn't work, does double-clicking a folder on the desktop still work? Should be the same mechanism.