More specifically for AccuSeason, a REX Service Update 5.5 has already been deployed, automatically for the user, and it therefore avoids a drop in performance with Sim Update 10. This problem is therefore fixed. Here is the full announcement.
Only REX Weather Force for MSFS, is not compatible until now, it will need a fix that is under preparation. REX developers are presently compiling a new build for Weather Force and will be sending it out to you sometime later.