Updating from 3.04 to 4.01 does not upgrade VS2010 SP1 projects, so nothing can be built any more!

We find that no projects which worked with TADP 3.04 can be built for Android with TADP 4.01 after updating

Loading any of them into VS2010 SP1 and attempting to build gives the following error message:

error : Nsight Tegra project settings have not been upgraded yet. Build cannot continue. Please open your solution in Visual Studio and perform the upgrade when prompted.

There is no such prompt. Please let me know how to make this appear or otherwise make the update work.