Since EdrawMax does not have an official .deb package or APT repository, the most reliable way is using Wine (Windows compatibility layer) or the cross-platform Snap version (if available). In 2021, the Snap was the cleaner method.
sudo snap disconnect edrawmax:home
sudo snap connect edrawmax:home
sudo dpkg -i edrawmax-2021*.deb
EdrawMax is a versatile diagramming tool used for creating flowcharts, mind maps, and organizational charts. While Ubuntu 21.04 and 21.10 (the versions released in 2021) have reached their end-of-life, the installation process remains consistent for most modern Debian-based distributions. Installation Methods for EdrawMax on Ubuntu install edrawmax ubuntu 2021