Open aagDexLib.livecodescript and then choose between chat demo.livecode or knowledge base demo.livecode and open those stacks. They will communicate with other machines on the same LAN.
On your home folder on a folder called .dex_store, inside that folder there will be a secret.json file with your identity, a feed.sqlite file with the feed database and a dex.log with a log of what is going on.