I just updated the firmware on my MX160 from 1.0.7-1 to 1.0.7-7. The documentation that came with it has the following note:
"If you have a System version loaded which is older than 1.0.1-21 (i.e. version 1.0.1-7), you should not save any Backups and should not restore any Backups that you have made. This will interfere with changes in the new firmware. New Backups can be created after installing V107-7. Also a Factory Reset should be performed, and RoomPerfect calibration will need to be redone.
When upgrading from newer versions (i.e. version 1.0.1-53) a Reset is not necessary, and the RP calibration does not need to be redone again."
I have not had any issues with my unit on the two previous firmware versions and so far, so good on the latest one. As the documentation mentioned above states, I did not have to re-run Room Perfect after doing this or the previous firmware update.
I hope those of you having issues get them resolved quickly as I know how frustrating they can be.