Version 4.2 of SQList is a minor update from ver. 4.1, you can therefore upgrade from free if you have a licensed version 4.0 or 4.1. There are no breaking changes in this upgrade.
See below a summary of the changes.
Support for ADFS authentication version 2 and 3
The main change in this version is the support for SSO (Single Sign-On) authentication with Office 365 using ADFS versions 2 or 3, for connections to SharePoint sites.
For more details, please read our support article here.
Enhancements to the SQList Manager configuration wizard
Added checks and informational messages to the configuration wizard to make setting up replications even easier. Also added checks to the SQList service when it is started, to ensure that all necessary settings are in place.
Minor bug fixes
Well...we're not perfect; sometimes we spot the occasional bug in our software. And we fix it ASAP.