Got my letter, booked in for next week. I have also set the one click folding mirrors via Carista so will see if it affects me as well. I have made a lot of changes with Carista in fact so I'll be quite disapointed if the updates wipes them all.
I had to reset the one click folding mirrors after the update. Didn't notice that any other Carista changes had been set back to default, needle sweep at start was still there though so it definitely doesn't wipe every change.