Using c2license anywhere?

I just bought a personal license for Construct 2, I noticed that all you needed to do was download the license and put it in your Construct 2 directory and it will automatically detect it, so I did that on my laptop.

My school has computers with Construct 2 free version, if I forget my laptop at home one day, could I put the license in my flash drive and use it at school? Or is there a "one computer only" policy?

I believe it's a 'One user' policy. I'm fairly sure you are welcome to use it on any computer you choose.

See How Construct 2 licenses work. You can use your license anywhere, as long as you are the only person who uses it. You can also install Construct 2 to a USB stick and take it with you - this is probably better than copying the license file to another machine, because it avoids you accidentally leaving your license behind (which nobody else should use).