Once you are fully sync'd it will display "In Sync" at the top.
To roll back to a previous commit, select the commit in the list on the right side with a left mouse click. In the main pane, click on "roll back to this commit".
On the right side it will now state "uncommited changes". Click on the "Show" button.
The main window will now have a bunch of files and state "Select all XXX files to be committed".
Right Click on that line and click "discard all changes".
You will now be back to that revision.
To go back to the latest, just click "sync" at the top.
-Rob A>