https://appinventor-mit-edu.ezproxy.canberra.edu.au/explore/ai2/update-setup-software
The download for windows is not working.
https://appinventor-mit-edu.ezproxy.canberra.edu.au/explore/ai2/update-setup-software
The download for windows is not working.
True, link does not appear to be working on both pages
In the meantime, you can download an alternative emulator like MemuPlay and use the Connect->Companion dialog to connect to a copy of the Companion on an emulator.