migration from CCS 3.3 to CCSv5

While migrating a CCS 3.3 project to CCS 5.1 with a FinalBuildCmd, the command gets converted into a post build batch file in CCSv5 . Our final build cmd converts from .out to .bin file which uses hex470 to achieve it.

Building the CCSv5 projects gives the following errors.

'hex470.exe' is not recognized as an internal or external command,
operable program or batch file.

Our question is what is the best way to add the path to hex470.exe from CCSv5?

Thanks,
Shilpa.