In order to uninstall the program from your computer, I recommend you try a utility from Software Informer database. Many of them are free of charge and will force the application to uninstall by wiping out all traces of its presence from the system. After that, run a registry cleaner to to make sure that there are no leftover registry keys in your system and reboot the PC.
Note: After that, if you want, you can download and reinstall the program to see if your problems have been fixed.