Sorry if this has been suggested already.
It'd be nice to stay in sync with the work plugin creators do to improve and fix their plugins based on community reports.
I propose an update system or an alerter that at the very least, can handle plugins (consider the main program with a "beta" mode switch).
This could be created as a forked process, on user approval, it can read the current MB state (e.g. playing), terminate the main mb process, update, then reload mb and resume state (the updater would handle installations and portable versions).