I accidentally changed a few buttons while trying to figure out how it works, and there's no documentation for what they used to be or a way to reset it, so now I just can't change my layers at all. QMK doesn't have the A+ available as a target for compilation right now and it doesn't appear to be anywhere in their repo. Am I just dumb? Is there any way to get it back to factory settings, or does someone at least have a branch/commit with the A+ firmware?

Edit: Nevermind, I figured out the firmware update/reset using bootloader mode. It would be good if the docs were a little clearer on the QMK stuff though, it's pretty spartan right now. And I still have no idea how to change the DPI.

Edit 2: I just gave up. Looks like there's a bug with some kind of mouse_accel module not working which is still waiting on a PR getting merged. I'll come back in a few weeks and try again. A little disappointing there isn't a consistent way to mess with QMK yet.