Tabs Studio v2.3.5 released: added the Tab extensions regex rule to the Tab Coloring Rule dialog and added the TabExtensions property to the Tab control, updated the Marker add-in to save the highlighted tabs list when you close Visual Studio and restore highlighting when the solution is opened the next time, fixed several bugs in the Saver add-in preventing it to correctly restore tabs order.
Download link: Tabs Studio v2.3.5.
Tabs Studio Blog (organizing Visual Studio document tabs) 