In fact, I already did this: It created a new RockWorks folder, and then did the same error. I'm worried that there's a registry entry or some crap, or my carefully queried data is making it act all strange.
Just for grins, I uninstalled and reinstalled again, and the same thing happened. I'm not even trying to open any project folder: It does not even get that far.I see the error, click "continue", the RW start screen pops up, then closes immediately, and I'm back to where I was with no RW open.