Euphoria Pad has been replaced by a much wider range of pad sounds in the newest version of Sunday Keys. I'd recommend that you check out the “Shimmer Pads” category of Patch Builder for a bunch of options.
Sunday Keys Version 2
Using the Tonic Pad Player
Getting Started with Sunday Keys for MainStage
Troubleshooting Sunday Keys for Ableton
What Gear do I need?
Troubleshooting Sunday Guitar
My Song-Specific Patch is Different from the Demo
Customizing Your Song-Specific Patch
My instrument/controller isn't connecting