I get an "Access Error at address" whenever I drag and drop from one "Classification", e.g. from one Composer to another e.g. "Beethoven" to "Beethoven, Ludwig".
Also when dragging from one "Mood" classification to another.
Another example: when I create a new "Mood" classification in the properties dialog of a track, it does not show up automatically under the Mood classifications tree in the left pane. When I collapse the Mood tree and click on another classification and then expand the "Mood" tree again it appears. If I then select tracks in another Mood and drag & drop to the new mood, I get the "Access Error at address" error.
Also in several other instances dragging from one tree node to another.
When this happens then the MediaMonkey process does not shut down properly, I have to terminate the process from Task Manager.