Here's what I learned, the hard way. For Android users, if you want to roll back to the latest official release (2.5.12), from the beta. Don't try forcing if manually (from the memory card). It won't work. You have to use the Beta explorer app, and use the option they give you there to download and go back to 2.5.12. Then, if you want to go further back, you can use the "forced downgrade" option. I wasted a bunch of time by doing this out of order.
After rolling back the firmware, you can then roll back the explorer app, if you want to. You have to opt out first. Then remove the app. Then download the regular release. This may also be true for the ios version. But I don't have a way to test it. Basically, I think the beta version of the firmware is a huge fail. Autel is quickly losing the confidence of a LOT of customers. And probably losing a lot of future sales as well. I hope someone over there is paying attention to these issues, or they may find themselves facing a class action suit.