License question: XnViewMP in a commercial environment

[r0n]

I was told that, when purchasing a license for XnView, you can use XnView and/or XnViewMP.
On how many PC's may I install and use XnViewMP commercially assuming that I am the only user of XnViewMP.

With commercial use I mean: Do my graphic work (which is meant to be sold) with XnViewMP.
And with graphic work I mean: Any operation that you can do XnViewMP: Batch processing, Image editing, etc...

[xnview]

1 user => 1 license, so only one