Im 3 updates behind. Where are they? I feel i wasted my money

for what game?

I'm going to assume you don't use Galaxy.

Then they are located in your https://www.gog.com/account library.
Click the game, and scroll down to the patches.
Click on the patches you need. Install them.

That said, it will only work if the developers have made the updates available here on GOG.

(Also echoing previous poster, What Game?)

They have a single game, Craft the World, and have achievements in it so must be using Galaxy.

If Galaxy is acting up, contact support. It is still in beta and a bit buggy it seems.

Indeed Craft The World
The problem is with the developers not updating the game on GOG . We are 3 patches and 1 DLC behind Steam. https://steamcommunity.com/app/248390/discussions/0/4150581887545234803/#c2793874853448254280

I have achievements in Craft the World and only ever installed/ran it with the standalone installer and have never once launched it with Galaxy. It's not the only game like that.

GOG Staff are now notified, thanks for reporting.

Oh, but how does your GOG profile then know what you have played?! I know some games have ingame achievements. I have seen some too but forgot the titles.

Anyway, since it was a real problem, here is to a speedy fix.

Presumably the Galaxy integration in the games keeps track of that stuff even if you're not actively using Galaxy.