Not exactly. :) The Pro (or rather Commercial license, as we call it) is good for as many PCs as you purchase the license for.
If you purchase the license on a "per remote PC" basis for, say, 100 remote machines, then you can install and register the Host on 100 remote machines.
If you would rather prefer to pay on a "per operator" basis, then you need to pay only for the number of admin machines (Viewer machines) that will be working simultaneously. The number of remote installations will be unlimited.
Here's our license calculator
. Play with it and you will see what I mean.