Something has happened to my version of VFP 7. When I open the form designer, and try to change the forms control toolbar to a class other than "Standard", VFP chokes with an error that says "The memory address can't be read." These classes will all open just fine in VFP 6. I've tried:

Creating a new class in a new VCX
Running the Repair/Reinstall option
Compiling the class library
Completely uninstalling VFP 7 and reinstalling
Running VFPClean.app
With and without the three patches

None of the above attempts have fixed this problem! Has anyone else run into this? Is there anything else I can try, short of reformatting my hard drive and starting over?