I've only glanced of the above posts so I may be posting a thought that someone else has already mentioned. Just in case they haven't, though...

Have you tried... after transposing, going back into the "Key setting" (#1 on the below image) and then selecting "F#" in the column on the right (#2 on the image)?

This right-side column just sets the key signature and does not transpose.

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MY SONGS...
Audiophile BIAB 2025