How do I change the 'edit window' font?

1

I recently updated my Ubuntu OS and somehow my ‘edit window’ font changed from a mono font to a font that misplaces my chords. I use mono spacing everywhere else in Quelea and can edit as usual on the PC at the church. My work around is to edit outside of quelea and cut and paste into the my ‘edit window’ at home leaving the chords in the wrong spot in my ‘edit window’ but correct everywhere else. I have set all system and document, interface fonts to a ‘Ubuntu mono’ on my Ubuntu OS at home and reinstalled Qeulea but to no avail. Any suggestions anyone?? Thanks