I would like to try out the pcstitch. I have downloaded the demo version from the web site and installed it. Unfortunately when I open it, I selected the professional version first. Everything is fine until I try to create a new pattern, the application freeze and enter a non responding mode. I decided to switch to the regular version after I have restarted the application. Then I try to start the regular version of the application but I only get the splash screen of Pcstitch and it close. I'm using Windows vista.
Have you tried to reboot between the uninstall and the re-install? That might change something. I use Vista and have no problems with either Pro or Standard for 9.
You might also try to re-download the software. It may not have downloaded clean.