I've been using Construct Classic for a month or so now and this has never happened. When I opened it up, I couldn't do anything. I would try clicking everywhere and still just get a beep, the sort of beep you get when say you open 'options' dialogue in a program and then try to click around in the program. Thing is, I don't see any open windows like that. I did just open the program after all. Any ideas short of reinstalling the program?
EDIT: The beep happens once I open a previous program or start a new one. Before then I can click around.