Jeff,
Just a guess but it sounds to me like the file is corrupt which will result in an error like this. No need to uninstall and the configs. won't matter, the file has to be correct. Just try again after the suggestion below.
I'd try using this simple utility to be sure the file is not corrupt. All you do is copy and paste in the original checksum Sonus Paradisi shows for the file you downloaded and then run the utility against it. It will tell you if it's good or not. I've had a few occasions where I had to download files a couple times before they came through clean.
http://www.winmd5.com/
Marc