Hi John and welcome to the RH community.
I'd check that you have both of the 8.0.1 and 8.0.2 updates installed. Also ensure your RH source files are not located on a network drive. Bare in mind that whilst some users manage to run RH under Windows 7, others have reported problems. You should also note that Windows 7 is not an officially supported platform for RH usage.
I have both 8.0.1 and 8.0.2 installed. The RH source files are on a local drive (in fact, RH installation, FM files, and RH files are on the same local drive).
As far as I can tell, everything was working fine through Tuesday; no problems until yesterday.
Maybe something went crazy and it thinks you have multiple monitors, and your dialog boxes are opening off the screen?
Select File > Open, then do the following:
Press Alt+Spacebar+M, then any arrow key.
Waggle the mouse madly until the dialog box appears on screen, then left mouse click to drop it where you want it.
(I assume this will still work in Windows 7, but don't have that version to try it out.)
If you're having problems with all your dialog boxes, I think you'd have to access each dialog box and repeat to get them all in the right spot. Although I do remember something about a registry hack - I don't know if that affects all dialog boxes or just one/some. I think it was Rick who posted it originally, so he might remember and be able to answer that.
Thank you! This worked! And in fact, I am using multiple monitors (2 monitors). What apparently happened is that I switched which one was the primary monitor, and instead of having the dialog open on the "new" other monitor, it was opened off screen to the "other" side. (I hope that makes some sense for any future readers who may come by.)
I'm hopeful that you (and all others that have experienced this) will take a moment to report this to Adobe as a bug. We are noticing an increasing frequency of multiple monitor usage. The software we use (such as RoboHelp) should work with us on this and not against us. RoboHelp needs to be amended so it checks for this and presents the dialog on the proper monitor when these conditions arise.
Helpful and Handy Links
Submitted bug report per suggestion.