[RNasir]

The FTCReg.txt location is used by FIRST for record keeping. It doesn't have anything to do with designating your tele-operated program, and if you're using the FMS to test your robot (and not to run an event), you can safely ignore it.

Michael Coleman's post about how to get the FMS to recognize your designated tele-operated program is correct. There is an indicator on the FMS front panel that will display the name of the program you have currently designated after you connect. You can use that to make sure you've designated the one you want.