[Branda] Reset plugin from database

We’re having a problem with Branda Pro. We’ve set some settings in Branda that have locked out access to certain things as an administrator. We’ve tried to delete the plugin and install again, but the settings remain the same.
How can we remove the plugin and all data associated with it? I can’t access Dashboard->Branda->Settings to set the plugin to “Reset” configuration on uninstallation as well. Could you please let me know if there is a way to reset the plugin from the database, or through custom code?