I have upgraded from 4.1 final to 4.2pre8 and later 4.2pre11. It seems like it is somewhat upgraded because the plugins seem to load on demand and not at startup. However some plugins fail saying "xxx plugin requires 4.2pre x and you have version 4.1 final". This is under XP pro. I have tried installing clean in a new directory as well as installing on top of the previous installation. I have also tried removing the user settings and letting it rebuild them also. Do I need to fake out the registry? Any other ideas?