[solved] Is it possible to activate license without connecting to internet?

[Cloudsrest]

Thanks Simon,
We can't make our NAS connect to internet. Our network set up like this:
for local music network -> Router connect to DAC, NAS and a PC via Lan cables.
For internet -> mobile phone hotspot connect to tablets via wifi.
The thing is, we can connect the PC to hotspot, but can't connect the router or Nas to hotspot!
So, if we can install the minimServer 2 at the PC, active license. and we connect the NAS via lan cable to the PC. Will that possible to activate the license on NAS too? because we can connect the PC to internet.

Acording to the license page:
"Your full license does not expire and covers up to three installations of MinimServer. These installations can be on any of the platforms that MinimServer supports. For example, you might want to run MinimServer on a NAS and also on a PC or Mac."

We only want to run the minimServer on NAS in the future, and won't use PC if not necessary...Sorry, we want to keep the system simple, but never thought of having to get over this complicated process...

hope you can help us out, Thanks!