Excalidraw Windows Desktop Version Using Kooboo. For Mac Version, see video link below.
Getting Started
Download from the release or source code. Click Kooboo.exe to start, Then, click on "Start"
If prompted by a firewall for Internet access, click "YES" to continue.
Login Using admin / admin
On the login screen, enter the following credentials: user: admin, password: admin
Open Excalidraw App
Click the link below to open the Excalidraw App and log in again using the same username and password.
Excalidraw File Manager
You are now at the Excalidraw file manager page,
Click "New" to create a new Excalidraw document.
Above works for Windows. For Mac, please see below videos to do it yourself.