Do you have also a Company called "test" in your Companylist?
So you know how to Update?
Let all user leave Navision, make a Company-Backup, rename the main company to test,restore the Backup... and hope noone logged in in the meanwile.
With this little Tool (only one Form, no side-effect) you can sync any Table you want from one Company to another (e.g. "Main" -> "Test").
Works in any Navision (think so) from 3.70 updwards