ok Did a successful upgrade to my RFM used an xp laptop changed to 95 compatible, went to com port settings   from control panel  to hardware to com 1 then advanced, changed parity to even, set baud to the same as the update program. Saved the update to C: NO FOLDER. ran the update program, selected 1.5 update and 10 min later we are set to go   At no time did I change the uddate code settings. update code is flashing and disable is ghosted Don't try to install v1.6

Well done. I haven't tried v1.6 as it didn't have any features to improve the system apart from pricing specs or something from memory. Now to get dazzat going.