I've used the software for a few years. At the end of last year I downloaded PCStitch 11. I installed the software but when I want to start the program the following message opens "PCStitch stopped". It doesn't even start. Tried to uninstall and install it again but with no effect.
How far into the program does it get? Do you get the splash screen?
Are there other messages?
The only thing I can suggest is you uninstall again. Maybe use something like Revo Uninstaller to make sure all parts are out. Then REBOOT before you install again.