[Zubersoft]

Yes, that's what the "Update existing song with new file" will do. You can also long press the song, tap the three dots at the top right and then tap "Swap File" to swap in a new version. Lastly, you can just replace the file on disk and MobileSheets will scan for any changes. As long as the file hasn't changed in any major way, it's perfectly safe to do that.

Mike