The 1.31 update was released earlier so you have two options to install without going to a beta version (Hello Games calls these experimental):
1. Install now using the Galaxy client.
2. Wait until tomorrow when GOG makes the necessary changes so that it can be downloaded for installation without using Galaxy.
I always wait a week or so before thinking about installing any update to No Man's Sky. Within a week of releasing a new game version there will be at least two, if not three, emergency patches so rather than to deal with the problems I just hold off for a little to allow the major crashes or other issues to be corrected. I still download and save each version as they are released, just in case, but wait to install the later patched versions.
DanMiam: There is a hotfix for most common problems on the steam platform, it's a beta optional update tough , can I download it if i'm willing to use galaxy client?