@Mr_U It’s currently possible to play the iPad version of the game right now, which is technically an older version. However, all of the automation battles are broken due to their names being changed on the server.
Also, all of the older versions of the Aetherlight are all available for download as zip files for PC, but it would take some serious hacking to get the automation battles to work. The server also applies the RP stuff to your character regardless of what version you’re playing, I’ve noticed. So yeah, you’re basically stuck with the latest disaster.
I have thought of trying to play a version before RP fatigue was introduced for the purpose of quickly leveling characters. That might be practical if I can dodge/use all of the previous glitches.