Why do they live demonstrations on RunKit stop working after a while?

This is due to a timeout of RunKit, which is used by the live demonstrations. This will not happen with the programs launched from your own computer.

Why are sometimes the live demonstrations not available ?

Please see https://q37.info/s/zgvcwv7j.

How can I be kept informed of coming releases?

The news section will contain the announcements about new releases.

To be informed of the latest publications in this section, you can :

Under which license(s) is the Atlas toolkit available?

This information is available here.