Thanks James! I now understand better the issue: Anydvd is not always able to detect the region for some discs (and this is normal), in these cases if "automatic detection" is ticked, even if parent option "region remove" is unticked, the disc region is asked the user. This behavior was not present in 8.4.0.0, and if region removal was not flagged, region detection was completely skipped.
Question 1: since I'm not setting region removal, setting a random region (i.e. I set Region A and I insert a Region B disc) doesn't have any effect on disc ripping/play, is it correct?
Question 2: behavior in vers 8.4.0.0 was more correct in my opinion, if region removal is unticked, "automatic", "region A", "region B", etc., sub-options should be ignored, this makes also disc analysis faster and UI aligned with sw behavior, can you check if this can be fixed?
Final note: I tried to set "Always ask for region code of inserted disc", and this is correctly ignored for region detected disc if region removal flag is off.