That zip file contains the source code
You probably want to choose one of the binary packages
Win64 exe for windows
Dmg for Mac( arm64 for ones since 2020)
App images for Linux
Etc.
David R Weist wrote
Hello,
I happened on librecad as a frree and effective replacement for AutoCAD which is too expensive for me to justify. I have the 2.2.0.1 version and I've been using it to create a view of my property for documentation purposes. However, I've experienced a few "bugs". I now want to upgrade the program, however, I can only git an upgrade from github (the source forge option no longer appears on the web page). I've downloaded the LibreCAD-2.2.1-latest.zip file, but have no idea what to do with it. Can anyone tell me how to install the update from this file?