If you navigate to the Sandbox.sbc file, there should be a line that looks just like this : <ExperimentalMode>true</ExperimentalMode>
Change that to False and then start the server back up!
The file is found under the /instances/saves/yoursave directory!
Closed Beta Release Date is September 23!
Earlier this morning, Picroma pre-purchasers (way back in 2013) received an email with steps to activate a key on Steam. That key unlocked a version that revealed a splash screen with a release date and a cool mini playable demo of your character on a flyer traversing the Cube World map.
It requires Alpha access to the current Cube World to play. If you do not have this access yet a Steam key will be purchasable at a later (unknown) date.
HOW TO GET YOUR STEAM KEY FOR CUBE WORLD BETA
Log into your Picroma account that has Cube World Alpha.
Go to My Games.
Steam key will be below the download option for Cube World Alpha.
We can't confirm whether or not servers will be available day one at this point, but hoping for that to be the case.
Hoping for some more news from @wol_lay soon!