Since some time, my BIAB have a strange behaviour:
1) I work with song X, saves it and close BIAB
2) Later, with BIAB not running, I click on song Y in windows explorer
3) BIAB starts and I think I can see song Y flash by. But then BIAB immediately opens song X!
4) In BIAB's list of recently opened songs, I can select song Y which then opens correctly

As with almost everything in BIAB, there is probably a setting to be changed ...