Thanks. I downloaded the latest version but the hotkey only seems to work once. After that, it doesn't seem to trigger an action.
Have you tried a restart of MB?
If so, and the problem persists, you should probably post a bug report. Be sure to list your version and a step-by-step of what you are doing. I guess the main question is if that's the intended behavior, although it would seem that it should save and advance with each invoke of the hotkey.
Steven isn't very available on the forums these days, due to his working on the framework for version 3, but it may catch his eye and offer some advice.