Uninstall properly

Hi,
I was searching from where all the *dopbsp* tables in the database are comming from.
In the *dopbsp_settings_calendar table, I found a field with “wp-content/plugins/booking-system/templates/beautify” in it.
So I expect that all these tables were created when I installed your plugin.

I was hoping that all plugin related files/DB tables are removed after uninstalling the plugin from the plugin page. But it seems that a lot of (all ? ) tables aren’t removed from the database.
How can I remove the plugin properly (nothing from the plugin should remain after uninstalling it) ?

Thanks in advance.