You can temporarily disable ProjectWise integration using the Disable Integration button on the Bentley tab in Revit.

This lets you quickly suspend integration, without having to turn off the feature entirely through the ProjectWise Explorer installer. As soon as you click Disable Integration, integration is disabled and the name of the button changes to Enable Integration. When you are ready to resume integration, click Enable Integration.

If you disable integration and then close Revit, integration remains disabled the next time you open Revit. Also, when Revit integration has been disabled in this manner and you try to open a Revit document from ProjectWise Explorer, you are prompted to re-enable integration and open the file.