Serato DJ Pro software is available free of charge from the below website:
Serato

The euphonia supports DVS control of the Serato DJ Pro software under the Pioneer DJ Certification Program.

Simply connect the euphonia to your PC/Mac and you can instantly use Serato DJ Pro’s DVS feature to control digital audio files stored on your computer via turntables (with the Serato DJ Pro control vinyl) or via the jog wheels on multi players.

Buy or update to the latest version of Serato DJ Pro and the Serato DVS Expansion Pack to use the DVS feature with the euphonia.

You’ll also need to update your driver software for the euphonia to the latest version if you haven’t already.

Serato DJ Pro software download

You can download Serato DJ Pro from Serato.com.
https://serato.com/dj/downloads
Serato DJ Pro Installation guide

Connection and setup (Serato DJ Pro)

For instructions on how to connect your equipment and set up Serato DJ Pro software (Windows/Mac OS), see: Connection Guide