Well, it installed... Rated 2 out of 5 stars
...And it's (finally) "compatible" again. But no control appears in the TB8 status bar, so I can't actually use the add-on anymore, which is a shame, because I used to use it all the time. I really miss it. Right now, it's like having my cake, but not having the chance to eat it.
It's also unfortunate that v1.3 is not compatible with TB8.