Have to re-enter license each time I launch eM Client (Mac)

I keep getting the attached error every time I launch eM Client.

I am using this license on my 2 computers, is the solution to purchase a new license for the second computer? 

If so, I am more than happy to do that - just want to make sure that’s the issue before I purchase.

Thank you

Yes, the license is per computer.

For Free Licenses, you can register additional licenses using separate email addresses. For Pro Licenses, you need to purchase an additional license for each computer.

Got it. I will gladly purchase another license for the second computer. Thank you