hello

I need to move zenphoto to a new server and use a new domain name.
My current version is 1.4.9 but on the new server it is 1.4.12, what is the best way for me to migrate everything correctly ?

Thanks

Start with moving your 1.4.9 istallation to the new server.
http://www.zenphoto.org/news/moving-and-changing-existing-installations/#moving-to-a-new-server

After that, upgrade to 1.4.12