Howdy,
Or, you can "reverse transpose" the other parts
If you're doing hymnbook format (sop/alto on treble clef and ten/bass on bass clef), then you'd
1. enter your score (or open your .mid - not sure which you do)
2. analyze for chord names
3. Use the Staff/Transpose Actual Pitches (yes, this one) to change the key to what you want to play in while capoed.
4. Now, select the notes in the score (you can easily select all the notes by using Region/Select, hit ok, then Region/Convert region to selection of notes)
5. Press the P (for "pitch") key on your keyboard, and then the Up or Down arrow on your keyboard for the number of half-steps (which corresponds to the number of frets) you need to get the notation back to concert pitch.
This way you still have all your capoed guitar chord names without individually editing them, but the written parts are adjust back to the original concert pitch.
And be sure to put some kind of annotation that the chord names are for the capoed guitar
ttfn,
Sherry