There is no automatic uninstall, but here's how to:
1. Go to Manage Hacks -> Hack Tracking Log -> Run Install Sequence -> Run VERBOSE TEST installation -> continue to the File Modifications step. Now keep this page open in a separate window until step 8!
2. remove the three templates
3. run in debug mode
4. go to Manage Hacks
5. go to the Controls drop-down for the Hack Tracking Log, choose Remove Phrases
6. Confirm to remove all HTL phrases
7. drop the tables `hack` and `hacklog`
8. remove the file modifications (from the browser window from step 1)
9. remove all HTL files (see first post)
That would uninstall it