Needing some info regarding the very confusing per-seat licence

Hello Unity Community!

I am looking forward to buying an editor extension and I've noticed it has a "license-per-seat". I've searched around the web and it's apparently a very confusing licence type, and it confused me as well. I own two computers, a desktop and a laptop. I do most of my work on the desktop, but sometimes while travelling I also work on my laptop.

Now my question is this: do I need to purchase TWO licenses just to be able to work on both machines?

• If yes, shouldn't this be a per-computer license?

• If no, shouldn't this be a per-user license?

Do I have to make sure that nobody else has access to the environment? Let's say I leave Unity idle in the task bar and my mom watches a video on YouTube. Would that mean I violated the license agreement by allowing an unlicensed third-party to access the editor extension?

What if I get, let's say, a weird script behaviour on my desktop and decide to test it on my laptop at the same time, side by side comparison. Or maybe I forgot how to do something and I want to open up another project and check out how I did it there. Would I be in violation of the licence agreement by having two instances running at the same time?

Or what if I buy the extension on my laptop, and a month after I want to replace the laptop with something newer, or get rid of it altogether. On what device can I use the editor extension then?

This licence doesn't make any sense to me whatsoever, so any help would be greatly appreciated.

Thanks for your time!