1- Take a snapshot of the current TFS Server
2- Uninstall Visual Studio Team Explorer 2010 (Shield) and all the references to any pre-release product
I also remover the Power and the SideKicks Tools, the Shell edition, etc.
3- Delete the folders related to old installed version
4- Start the re-installation of the TFS RTM, the same options installed in the previous version
5- Select the Upgrade Option
If you follow the link no patches are required
I know this screen show the optimal situation, If something goes wrong they will not help.
Re-Install the new versions of Power Tools and SideKicks