No specific info about version 3.1. Please visit the main page of Setapp on Mac Informer.
DPS App Builder lets you build a custom viewer app
Apps Assist is program that helps you manage iOS apps on your Mac.
Create viewer apps for single-folio, multi-folio, and subscription viewer apps.
Create Apple application icons in the Monolithic System style.
All My Mac Apps is a Fluid app that lets you browse the AllMyMacApps.net.