System requirements:

• 2.4 GHz CPU or faster (multi-core recommended)
• Windows 7, 8 or 10
• Graphics card with OpenGL 3.2 support

Required software on Windows:

• Microsoft .Net Framework 4.7.2

Building on Linux:

These instructions are for Debian-based distros and were tested with Debian 10 and Ubuntu 18.04. For others it should be similar.

Note: this is experimental. None of the developers are using Linux as a desktop OS, so you're pretty much on your own if you encounter any problems with running the application.

• Install Mono. The mono-complete package from the Debian repo doesn't include msbuild, so you have to install mono-complete by following the instructions on the Mono project's website: https://www.mono-project.com/download/stable/#download-lin
• Install additional required packages: sudo apt install make g++ git libx11-dev mesa-common-dev
• Go to a directory of your choice and clone the repository (it'll automatically create an UltimateDoomBuilder directory in the current directory): git clone https://github.com/jewalky/UltimateDoomBuilder.git
• Compile UDB: cd UltimateDoomBuilder && make
• Run UDB: cd Build && ./builder

Links:

• Official thread link
• Git builds at DRDTeam.org

More detailed info can be found in the editor documentation (Refmanual.chm)