Well, I'll give this general advice. Sometimes uninstalling a program doesn't completely uninstall it, and some residual corruption persists even after you reinstall. What I usually do, then, is after uninstalling, I delete the folder which had contained the program (which is usually left over). You might also try reinstalling to another location.

If that doesn't work, what I have sometimes resorted to is using regedit to manually remove any reference in the Windows registry to the software before reinstalling. You can search for anything relating to "Pronto" or "Philips" and delete those keys. It's inelegant and kludgy, but that approach has sometimes worked for me.