You will need access to the archive server as this is where the Archive Server Configuration application is installed. You can download SQL Server Management Studio (SSMS) from Microsoft. However, you will need to know the account and password that your VAR used when they installed SQL Server Express. If you aren't familiar with the process, you probably need to get you VAR involved anyway.
The PDM Installation and Administration guides go through this step by step quite well.
The installation guide is available from the net here: Administration Guides | SOLIDWORKS
Chapter 10 goes through all the backing up.
If you open your Administration tool > Help > Administration guide. This is very useful when configuring your vault.
I have learned, that our VAR installed it on our server via a remote desktop, to an area I don't have acces to.
In short, I am not able to upgrade our PDM. We have asked our VAR to, install the upgrade on an external server / cloud, when the time
comes. We are about to move everything on our own server in to cloud servers. So I will just have to wait a little longer.
Thank your for your replies.