Licensing

Hello,
I’d like to know how the licensing works for using your application in multiple PCs.
We deploy an application in several customers around the world and our main issue right now is that our playlists may contain several audio files with different volume leves which makes it really annoying when played because of the difference in the volume levels.
So far I think your app is just what we need but because of our business model the licensing may be an issue.

Thanks in advance.