If it's a MIDI file that is your source and you just loaded it into BIAB, then everything from that file is now on the melody track. Changing the chord for one of the bars in the chord grid won't change any notes on the melody (or soloist) track, only on the other BIAB tracks.

Assuming that is the case, then it seems to me that the easiest thing to do would be to edit the individual notes on the melody track and must move them up one whole step (thus changing from Em to F#m).

If that's not the case, and it's a true BIAB arrangement, then you should just be able to change the chord for that bar from Em to F#m, but you're going to have to regenerate the arrangement to get the change to take place, which would be similar to what you have now, but with some differences.

You could also take your file into RealBand and work on that one bar there as well.


John

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