Wow, didn't expect this topic to still be alive.
Yeah, I did get mine fixed. I copied the APK and whatever that secondary file that some apps have to the system folder where they're all stored, and made sure the permissions were the same as the other APK's in the folder.
The updates don't look to see if the apps are installed, they just check to see if the files are in the right location. I ended up having to fix the Slacker radio app in the same way.