Thank you! Was able to update successfully from the link you gave. Appreciate it!

This worked for me too. Thanks!

Normal update worked like a charm for me now. Not mad anymore at GOG.

I finally bit the bullet and have GOG. Promptly bought a ton of old school CRPGs. Loving it so far
Am getting am update notice... I've been ignoring it but maybe I'll try this approach

I installed 2.0.60.2 manually because the previous versions wouldn't update, and now my 2.0.60.2 won't update either due to a
Root Exception: Error Message: CreateProcessWithTokenW failed with code 1058.

Guess I need to find a 2.0.62 installer now...

Bookmark this JSON file. It will point to the current full installers, as long as they don't bump the major version from 2.

I suggest performing a clean install (ignore the link for the full installer; that's an outdated version now).

Thanks for the link! Will just have to wait and see if my .62 can update to .63 next.

well, my version finally updated to the 2.0.62.26 beta
without issues that I can see.

took gog long enough to fix this update bug...

but better late than never....

what a bunch of incompetent devs...this error was appearing for like months... every year things are getting worse with software...

Thank you so much. My only question is why is the 2.0.58.xx still the file on the main website? I just tried it again 5 minutes before finding this thread.

You're welcome, though the latest version is currently 2.0.67.2. Like I said in my previous post, this JSON file will always point to the latest full installers (unless they bump the major version from 2.x). It's readable in Firefox by default, but the same can be accomplished in other browsers with an add-on like JSON Viewer.
The website doesn't link to a specific version. It gives you a stub installer, which connects to the Internet to download the needed components. The idea is to save time and bandwidth for people who are upgrading by not downloading the full package. Some people can't use this installer — likely due to their firewall — so I link to the full installer in my posts.
I don't know why you'd end up with an outdated version after using the stub installer. Maybe the installation actually failed and it didn't upgrade your installation.

Perfect, thank you for this - I didn't have a JSON viewer, but followed your link to install one, and now I can see the download links. I installed by right clicking Run As Administrator after I downloaded the file, and it seems to work just fine.

Thank you so much for that JSON file, this problem just started for me which is insane since it seems like it's over a year old, I cannot understamd how that is possible, I wasn't really having any issues until recently, I also had a beta version too but it too was tellomg me ot couldn't update. It't must have been just before the fix. I thought I was the only one dealing with it, I am glad I was not.

Thank you!