Upload & Sell: Off
It is easy enough to do yourself. Just click the Start button, and type regedit into the command line field. Once in the Registry Editor, open the hkey local machine part, then Software, and then look for Sigma Corp or SPP or similar, and select it, and press delete. This will delete all the settings this program has made in the registry since being installed, and may fix the reinstall problem. If it doesn't fix it, there may be DLLs in the System32 or Windows directory, or other crud lying around, but the registry is a good first try.