Hey Arne,
I saw your post and wanted to personally reply as the CEO of GEO Jobe. I hope some of our existing customers reach-out on this thread as well to share their experiences.
Our installation guide can be found on our public knowledge base. I have included below the landing page of the knowledge base and a link to the most relevant article. Also, we offer extremely affordable advanced support packages that cover installation where we can work with you on a remote desktop or screen share to do the install for the client if they prefer that over following the below linked guide. Feel free to reach-out at connect@geo-jobe.com with any questions. We honestly try to respond to and support our user community as quickly as possible.
https://geo-jobe.com/kbase
Installation Article
In regards to maintenance, new builds are shipped to the client as requested or at least yearly to make sure they don't fall too many versions behind. The new build is a zip file that can be updated by simply unzipping it to the same directory and restarting a service on the server.
Please reach-out if we can help at all!
Best Regards,
David Hansen