Where did you get this information about the SW only downloading on 119? That is false information. While using the Install Wizard on an RA or new receiver, the checkswitch is run in the background and based off of your orbitals, the receiver knows where to pull the software from. (EA/WA) A manual checkswitch should not be necessary. It is possible that there could be an issue and running a manual checkswitch will correct the issue of SW not downloading, but if SW isn't downloading then that sounds more like there was a signal problem first. Then you run the checkswitch and verify signal and then the receiver knows where to pull the software from based off of the orbitals.