How do I deactivate or remove a plugin if the backend does not show up anymore?

Which field in the database do I need to edit?

The easiest is to temporarily remove the plugin from the file system istelf. Otherwise you have to search the options table for it.

If you still can access the front end, you could add the function call purgeOption('zp_plugin_filenameofplugin'); or setOption('zp_plugin_filenameofplugin, 0, true);

Thank you!

I wasn't aware that I can just put "0" in the field "value". I was expecting something "not trivial"