Try downloading the same version from flex then drop the .exe file from this package and overwrite the original it should work
Also i have since found out this only works on the 1 watt version when I bought the 100 watt I found it does not key the 100 watt pa you can remove it and run an external amp or modify the internal for manual key not reccomended because it needs to select proper filtering to through software I have not been able to find in the code what controls the amp yet