Document Well 2010 Plus is another tab extension for Visual Studio 2010 that comes as a part of Productivity Power Tools. Tabs Studio hides Well tabs along with original Visual Studio tabs, so it is highly recommended to just turn Document Well 2010 Plus off:
Document Well 2010 Plus turned off
As Well is a part of the big Productivity Power Tools package that can be installed for other extensions, it can be left in the default on state and interfere with Tabs Studio. To warn a developer about a possible conflict, I’ve added the explicit check for Well presence to the Tabs Studio startup procedure. This is the warning displayed when Tabs Studio detects installed and activated Document Well 2010 Plus:
Tabs Studio conflicts with Document Well 2010 Plus warning
Tabs Studio Blog (organizing Visual Studio document tabs) 