I don't use chordpro files, but it's my understanding they are basically text files, therefore editable in any text editor. They only have a different extent to allow chordpro aware software to understand they have a specific format.
Graeme
1: Samsung 12.2" SM-P900: Android 5.0.2
2: eSTAR GRAND HD Quad-Core 4G 10.2": Android 5.1
Some of my music here - https://www.soundclick.com/graemejaye
1: Samsung 12.2" SM-P900: Android 5.0.2
2: eSTAR GRAND HD Quad-Core 4G 10.2": Android 5.1
Some of my music here - https://www.soundclick.com/graemejaye