1.1: A user wants their License Key released. 
Hello 
Your License Key has been released. 
Can you tell us what happened when your License Key got stuck? Were you having problems with Lumion, or was the computer turned off while Lumion was running?
For future reference, you can release the License Key yourself by following the instructions below: 
Let us know if everything is working as expected now.
3.1: Procedure info:
3.1.1 If they ask to release a License Key urgently, search for their email address (or PC name if they provided that) in the support dashboard https://partners.lumion.com/SupportBoard/Default.aspx
3.1.2 In this example, you would search for serge@lumion.com or DESKTOP-79L2UHL to check if there is a License Key stuck
And you will find this
You can see that 0319-A478A-LUMNFR is in use on my computer (let's pretend that it's stuck).
3.1.3. What you need to do is click on the DESKTOP-79L2UHL entries and click OK to deactivate them (usually there is only 1 or 2 entry to click but since it's my License Key there is more than usual)
3.1.4 Once you cleared all the entries, it will look like this and the License Key will be ready to use
3.2: Log the release in our tracker (this step is no longer needed): 
3.2.1 To do this, go to the Lumion License Key release log.
3.2.2 Insert a row above the last entry (Right-click on the last entry -> 'Insert 1 row above')
3.2.3 Fill in the requested information
3.1: Reference: Staff Dojo Training