Yesterday went to fly my inspire. When I started everything up, I went to check the return home altitude and to my astonishment found it to be 20 meters while I am sure I kept it at 60 meters! Checked other settings, everything was reset, i.e. altitude ceiling was back at 120 meters, automatic gear retracting was set to ON again, C1 and C2 button assignments changed... I did not like this at all and it could cause disaster especially with the RTH altitude! Did anybody experience this before? I had not done any firmware upgrades prior to this but the firmware BIN I kept on the memory card, could this have caused it?