Rated 4 out of 5 stars

really nice addon, works quite well on Linux TB24 with some minor drawbacks:
- when text is below the buttons in the main menu bar, the icons are misaligned
- an item in the tree on the left that is highlighted becomes near invisible when selecting a message in the message pane. Perhaps using black letters with items that are 'not in focus but highlighted' works better (like it did with TB 2.0)

Other than that this makes TB 24 workable again!

This review is for a previous version of the add-on (1.3.0).