The latest version 2.6.2 of PrBoom+ with UMAPINFO support has been released on Feb 11, 2022.   Source tarballs and the changelog can be found here:   https://github.com/coelckers/prboom-plus/releases/tag/v2.6.2   Windows 32-bit binaries are available here:   https://github.com/coelckers/prboom-plus/releases/download/v2.6.2/prboom-plus-262-w32.zip