I need to jump in here... I actually had the exact same issue that DeeAnn describes in this thread. I was scanning in a satellite when the receiver hard locked. After giving up on it recovering, I pulled the plug. The next time it came up it wouldn't boot. I tried a second time, and it came up with "Sorry, Spark2 has crashed" with an OK button. (What if it's not OK?)
After that happened, the satellite list was back to European, and the channel list was gone. I suspect what happened is that it booted up, detected that the satellite list was corrupted, and automatically reverted to a factory default. The factory default in this case is European, not US.
All I had to do though was go into the backup utility, restore my latest backup, and everything was fine again. I had to re-enter my timers, but other than that everything was dandy.
I stand behind my statement in another thread that the Amiko A3 is about 98% stable. The 2% of the time it fails it can really screw you over though.
Also, this is not an Android or Google problem. It's a problem with the receiver software that is a layer above that. As a case in point, look at the Amazon Fire TV, which runs the same version of Android. That thing is absolutely rock solid stable. It really comes down to Amazon having more and better software engineers than Amiko. (No offense to anyone; it's a hard standard to live up to.)
I actually really like my A3. But I'm a very high end user, so I can recover from problems without any significant downtime or sweat. I don't recommend this box for novices.
$.02.