You're asking how to get the event to end, or how to get a new version of the game? 0.7.0 is the most recent version of the game. So long as you're not still in the experimental branch, you should have the most recent version.
Viewing post in Looking for help or tips?
You can end the event by jumping down the hole, where the lasers are coming from. Be aware that enemies will be around, so be careful. If you're quick, you can make it easy. Simply jump down the hole and upon reaching the bottom, you'll be teleporter back to spawn and the event would have ended. Be sure not to touch the central laser, as well, as it will kill you on contact.