I am running windows 7 professional 64-bit and up until this week was running MPLAB 8.92 IDE. Now I get a brief look at the splash screen and the IDE refuses to launch. I downloaded and ran the latest version of MPLAB X and it runs, but doesn't like legacy projects with "spaces or odd characters" in the pathname. Has anyone else had this problem? I have tried the normal sources - Microchip forums, Googling, etc, and although there are examples, none of the solutions have worked. I have tried uninstalling and re-installing, running as administrator, using the -noswitch option. Any help would be greatly appreciated.