Just an FYI in case anyone else encounters this problem. What was happening to me is not matter how I would launch this program it wouldn't do anything. It would just sit idle in the background. I discovered that if I did a taskkill or pskill on all msiexec.exe processes, and THEN run the uninstall client, it would then work.
Took me like two hours to figure out what was happening so maybe this will save someone else some headache
Cheers