Workaround Rated 1 out of 5 stars

It is not elegant, but for me it is working again. Like Webvoyager describes here: uncheck 'Expand the Folder Tree', in Add Bookmark Here ² options and then i installed Edit-Bookmark-Plus. Now it is working again, but i sure hope there will be a bugfix soon.

This review is for a previous version of the add-on (13.0.20120505.1-signed).