DR-635 Out of Band Transmission
After the DR-635 is modified for out of band transmission, complete Communications | Get data from radio into a new file to let the programmer know that the radio is now modified.

Once you have completed this step, return to your original file (the one you had before the modification was done) for programming. After completing Communications | Send data to radio, the radio will still have extended transmit.

If you do not complete this part of the process, the radio will no longer transmit outside the ham band after it is programmed.