I did and restarted MP2 Service but before I opened the MP2 client, I checked to see that the stations were still mapped. I couldn't get to the config - socket exception. Restarted MP2 Service and now I can get to the config - no TV channels mapped to a card!!
However, you were suffering from a version mix of MP2 and MP1. If you don't need MP1 anymore you can trigger the "Uninstall" from the control panel.-Tthis will give you an error message that the software has already been removed. Reply yes when asked if you would like to remove the entry. Then delete the original folder in ProgramFiles that you had renamed earlier. You can then also delete the respective MP1 data files.