I do not want to uninstall code rush. I just want to have the chance to turn it off when I don't want it.
Is this possible? (express version)...
First you should turn on the "DevExpress" menu. This is hidden by default in CodeRush Xpress.
See this blogpost http://www.coderjournal.com/2009/08/show-coderush-xpress-9-2-menu-in-visual-studio/
Once this is done you should be able to use the Unload/Load menu option (Last item on DevExpress menu)
Additionally you can set CodeRush Xpress to not load fully by default..
Follow these steps to get to the Startup options page:
In the tree view on the left, navigate to this folder:
Core
Select the "Startup" options page. This page level is Expert, and will only be visible if the Level combo on the lower-left of the Options dialog is set to Expert.
Once on this page, you can toggle the "Load Manually" setting to dictate how CodeRush starts.