I’ve updated Tabs Studio to replace Power Tools’ tabs as well. I recommend selecting the Visual Studio 2010 preset in the Document Tab Well options:
Recommended Document Tab Well Options for Tabs Studio
Or you can uncheck the Enable scrolling option (to prevent scroller artifacts) and uncheck the Color tabs by project option (to use default colors for the line under the tabs) in the default Scrollable Tab Well preset.
Tabs Studio Blog (organizing Visual Studio document tabs) 