I did something very stupid during this plugin installation, I didn't upload it in the MU-PLUGINS FILE, so when I tried to remove the demo data also removed my super admin and all admins, so I lost access to my account. After I re-install my WP and restore all my data everything is fine. But the "demo content" is still here and now I need to remove it. If I install the plugin again, could remove this previews data created?
Or will be better to remove using FTP? But what exactly should I remove?
Thank you very much!