Anti Track setup can not find firefox.exe

Let's start with a known baseline 

I would start by uninstalling Firefox, and then re-installing it and see if AntiTrack can locate the FIREFOX.EXE, which should be located at "C:\Program Files\Mozilla Firefox\firefox.exe"

You may also want to check file permissions of the EXE file to ensure you can successfully access the file. Also check the permissions of the root drive to verify access.  I know these are basic things, but it's amazing how we overlook the standard troubleshooting steps.