Hi Peter,
Thank you for reaching out with your Total Upkeep questions! I’m sorry to hear you were having a bit of trouble but I inspected the URL you linked in the thread and it looks like the website is up and functioning properly.
I’m thinking if it was your first time activating the Total Upkeep plugin it must have taken an automatic backup and caused your site to enter maintenance mode. Normally when this happens the backup will complete in less than 60 seconds and restore access to your website.
Please let us know if you are still experiencing issues with your Total Upkeep plugin we will be happy to take a further look.