ID:2384565
 
(See the best response by Nadrew.)
Whenever I try to launch SS13 It says Dream Seeker Out of Date.

This is right after I downloaded Byond from the download page (Version [511.1385]). I've re-downloaded Byond 3 times but it keeps saying out of date.
Best response
You'll need to download the beta version from the bottom of the same download page.