Hi Claus,
Thanks for reaching out, Total Upkeep is a WordPress plugin so the best way to remove it is to visit your “Plugins” dashboard from the back-end of your website and deactivate and uninstall the plugin.
Please let us know what you’re experiencing if you’re having trouble removing Total Upkeep this way.
I hope this helps Claus, we look forward to answering any other questions you might have for us!