Musehub thinks I have musescore open

I've been trying to update musescore for a couple of days now, but musehub tells me I can't because I have musescore open, which I don't. The musescore application doesn't even think I need to update, but musehub still at least recognizes the update. This has happened before and after a while musescore finally registered the update, so maybe that will be the case sometime soon.