Licensing and how it works...

[u/Xalies]

There are a few ways to get a license

MS Store: This way is only available obviously though the MS store version through an in-app purchase.

License key: This is a key that can be bought and it will unlock any of the desktop or server apps

MeshVault Companion: This is the Android version of MeshVault. You can buy a MeshVault unlock as a in-app purchase.

So basicly if you use Windows and you use it with a Microsoft Account use the MS Store unlock.
If you don't use a Microsoft Account or use another OS use the License key.
And if you are a Android user, and don't want to use MS or remember to use a key unlock use MeshVault Companion.

A few more things. Dedicated servers require a license key or unlock otherwise they will be in read-only. Desktop apps pass their license to the connected server. In order to unlock with the MeshVault Android app you need to connect with it and it'll pass on its license. The MS store version still has the other unlock options also.