There’s a thread for more recent versions of the GUI here: ODrive GUI Beta Release, I will edit the first post of this thread to indicate that.
On Ubuntu, you can go to the link in the thread and download the ODriveGUI.AppImage file. Since you already have the python dependencies installed, you should be able to double click on the AppImage file to run it.
Please see this thread: ODrive GUI Beta Release. Make sure that you have installed all of the python dependencies and that python is on your Windows PATH somewhere.