I have tried to update my RX2SIM firmware some times, but everytime I connect it again a message tolds me "there is a new firmware version". So, I think I am not done it correctly.
I press the button before insert the USB > I can see the 2 blue leds on > I press "update RX2SIM" > It raises from 0% to 100% > I see "Done" and the Red Led.
At this point, I use the button for select my mode but, If I repeat the operation, there is again a "new firmware version".
Oh, you should not switch to purple mode again. Please switch to 'RX2neXt' mode (LED is red) and everything is fine. The Next can not talk to the RX2SIM while it is in purple mode. For this reason, an update message is displayed there.