Thanks.

FishSandwich wrote: Or use the in game patcher.

I've tried that, but even though all the entered credentials are right, it doesn't seem to work. I'm not getting any error message or anything. I'll look into it later, but it might fix that issue for good.

Installer Version : roaming directory (C:\Users\YOUR USER NAME HERE\AppData\Roaming\Factorio\saves)
zip Version : Install-Directory

Thanks for the answer, but I should have mentioned that originally the game was installed using the installer, not the ZIP version.

Are you suggesting patching ...

For the last three times I've updated I've had problem with my saved games...

The first time I downloaded the ZIP file, opened it, dumped the content into the installed directory and restarted the game. My saved game was not in the list so I happily started a new one.
Second time, I thought, "Well ...