I am using a URC-6131 (2K) and writing a protocol upgrade for an Onkyo Receiver using NEC1 Combo (PID 00 B6). Since the remote already knows this protocol, there is no protocol upgrade.
I noticed that functions work only if assigned to a remote key that doesn't require a key move. There appears to be a bug in RemoteMaster 2.01 that generates incorrect Key Moves when writing upgrades for NEC1 Combo for remote.
Even more interesting: if I do the keymove manually (using SETUP 9-9-4 etc. on the remote), then the keymove works, but when I subsequently download the remote to RemoteMaster 2.01, the "Key Move" tab in RM 2.01 becomes unoperable!
I attach the rmir file with non-working keymoves for the Onkyo receiver. You'll note the raw data is obviously incorrect on the Key Moves tab for the Onkyo codes.
Example of RMIR generates by RM 2.01 with non-working keymoves for NEC1 Combo