Is it posible to buy a licence for DisplayFusion which I can use for one computer at home and one (maybe two) at work? Or do I have to buy different licences then?
This post by Jon states that if you buy a licence through Steam -"Can be installed on any machine that you are the primary user, and have Steam installed on".
We're actually going to be making a change to the EULA for the Personal Home License that will allow you to install it on one work computer, as long as you're the only one that uses the work computer, and you make sure to remove the license when returning the computer to the company.
So, in short, you can use a Personal Home License for your scenario