How to let Accurev know that you have changed the workspace and let accurev map your stream to this new Workspace.
Step 1 - Go to File -> Open Workspace
You will see a list of workspace and you will see the old workspace mapped to your stream.
Step 2 - Right Click the respective Workspace and Click Edit.
Step 3 - Browse it to the new workspace.
Step 4 - Click Ok.
Now you will see new workspace mapped to your stream.