I am unable to update my ADS600EXP to firmware version 5.7, even when using my old iPad running software 9.3.5. My new iPad mini with software version 10.xx works OK in flight most of the time, but won't perform the update either. The in flight functionality on my iPad mini using Foreflight is spotty - sometimes it doesn't work at all. I'm thinking, if I could get this new firmware load, it might work OK. During the update it starts out OK, but then says "update failed" or something like that. After re-booting as suggested, it starts again, only to fail again. After going through this many times, it finally just kind of froze on the failed message. Clicking 'OK' only momentarily removed the failed window, and then it reappears instantly. The failed window is preventing me from doing anything else on the app. I don't know what firmware version I'm running, and I don't know how to find out. I guess I have whatever firmware was on it when it was delivered last fall. I've tried to update 2 other firmware versions before and they didn't work either, at least I don't think they did - no way of knowing as far as I can tell. If anyone has a method to update NavWorx that works, please share it here for all of us. I did pose the question/problem to NavWorx. Hopefully someone here or there will have an answer.