Sometimes because of anti-virus programs, certain batch files are not installed correctly during the initial install process. Under this condition, you will receive an error when trying to uninstall. See attached screen shot for an example.
To fix this, download the dummy batch file called: "PerformaxComDLLUninstall.bat" and place it in the directory shown in the error.
In this example the directory is "C:\Program Files\Arcus Technology\Drivers, Libraries, Source\Performax USB v1.30\"
Note that you will need to remove the actual batch file from the zip folder.
After this is complete, try uninstalling again.