Make a "Get help online" button to go with the bug and leave feedback buttons.
You should have a "Get help online" button on the Feedback toolbar that takes you to the forum. It should probably go to https://musescore.org/en/node/add/forum?forum_id=6 so the user only needs to enter a title and start typing the question. I suspect the lack of it will lead to a lot of bug reports that are requests for help. There are enough of those already. The button can be a question mark in a dialog bubble.