I think I know what you are trying to do so I'll answer to that end.
After your terrain has passed all the internal TE tests, you can upload it to the server with the included ahupload.exe utility in your C:\Hitech Creations\Aces High Editors\ folder. Don't forget to check the box that says Upload or that part of the process won't happen.
Afterward, you will find a host folder inside your terrain folder, and so long as you don't loose that folder and it's files, you can update and re-upload your terrain as often as you like. However, if you update it while players are using it in any arena, it will crash their arena.
It's actually best to keep the same name so try to pick the name carefully.