How to Find HOSTID of my machine

Hi
I'm in a pickle...
I'm using Global Mapper v20 single user node-locked license. But my 1-year support has run out. Last week, I deactivated my license and then reactivated it on the same machine the same day. Everything worked fine and a message popped up to confirm that a license file had been generated. GM worked fine.
But the following day, I got a message that my machine HostID doesn't match the license. I've tried various combinations of WiFi, network and docking-station access but none seem to give me the same machine hostID that I registered with, even though I'm using the same laptop with the same Windows install etc. Unfortunately, I've already exceeded the three-activations-per-year, so I can't just type in my order number to reactivate the machine again (and, even if I did, I'm worried that the same thing may happen).
Can anybody tell me how to identify the Global Mapper HostID of my machine so that I can try various internet access / docking station combinations until I hit the one that I registered with? Or does anybody know how I can get out of this mess????
Many thanks!
Answers
Disk Serial Number (DSN) is a unique serial number assigned to the volume (s) of your computer’s hard disk, which can be used for licensing purposes. The following procedure will let you know your DSN and use it to install a license for NI AWR products.
Open a command prompt. If you are not sure how to open a command prompt, open the Start menu, type cmd and press Enter.
At the command prompt, type vol c: and press Enter.
In the data that appears, find the 8-digit code designated as Volume Serial Number.
The case does not matter; you do not need to copy the hyphen. In this case, you will need to enter 12abcd34 in the required field
Typically, the HOSTID value in the license file is the MAC address from the network card or interface in effect when you license the software. This can be different depending on whether you are using a wired or wireless connection, or a docking station. One thing you might try, if you haven't already, is to start a command prompt and type "ipconfig /all". This will display information about all of the network cards it detects. Look at the value for Physical Address to see which one matches your license. Hopefully, that will be enough to help you figure out what configuration you were using when you licensed your laptop.
Cheers,
Bob