Node Locked Licenses
These are local licenses. A Node Locked license can only work on one computer, identified by its ID.
Installation
SkyReal
First you have to copy the license to the folder SkyReal\SkyReal\Content
of the package.
On the SkyReal launch page, you have a left panel with a Licensing tab. Open the tab and check Local.
You will see the different available licenses, select the correct one.
SkyPrep
There are two ways to activate the license in SkyPrep.
The quickest solution is to copy the license file to the root directory of SkyPrep. In this case, SkyPrep will automatically detect the license file and move it to the approriate location. The license will be set automatically.
Otherwise, you can start SkyPrep. If this is the first time you open the program, the license window should pop up. If it doesn't, click on the License button at the bottom left of your screen. You should have the following window on your screen:
Set the license type to "File" and set the license file path.
At any time you can re-open the license window using the license button:

XRCenter
You just have to place your license file in the root directory of XRCenter and start the XRCenter service using the .bat file.