I have Vectorworks 12.5 with RENderworks on a PC, XP Home. After I upgraded to 12.5 and upgraded Renderworks, everything worked fine. Then one day, 12.5 wouldn't open. I've tried to remove the program to reinstall but when I try that, I get the message, "Could not open INSTALL.logfile. I've tried working with the registries but nothing works. Version 12.0 still works though. What could have happened and how do I fix this? thanks