Dash License Tool executable jar is published to Eclipse's Maven repo and available at https://repo.eclipse.org/content/repositories/dash-licenses/org/eclipse/dash/org.eclipse.dash.licenses/
The latest version can be directly downloaded from https://repo.eclipse.org/service/local/artifact/maven/redirect?r=dash-licenses&g=org.eclipse.dash&a=org.eclipse.dash.licenses&v=LATEST
It's also available as a Maven plugin. There's more information at https://github.com/eclipse/dash-licenses