The ASIAIR keeps selecting hot pixels as guide stars in multi start guiding for me, thankfully I have been able to select a single star. The way I’ve been doing it is, hit the start exposing button, then hit the Start guiding button, then immediately, before the AAP has a chance to select its stars, manually select the star you want to use as the guide star and it still use that single star for guiding. You gotta be quick though and sometimes it’s taken me 3-4 tries.