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I have no experience with this module but shouldn't 'regular' module uninstallation work?
In the Modules Admin page, uncheck the module to deactivate it (4th column, I think) then submit. AFter that, you get a new option to uninstall in the last column. Then just click on the uninstall icon.
If you need to do manual deletion in DB, just check the sql file used (usually found in the sql/ folder) of the module and check what tables were created by that module.