There is also another difference between Scaler 2 and Scaler 3 searches.
Scaler 2 will correctly find B minor of you search for “Bm”, “Bmin” or “Bminor”. Scaler 3 currently requires a space between the B and the m.
I posted a feature request for this and related things here:
Scale search improvements - Scaler 3 Feature Requests - Scaler Music - Community Forum