Hello - I haven't played Eschalon I in a long time. I was just looking thru my library and noticed it had a blue update dot. Where do I find out when this happened and what changes were made. I seemed to assume every game here had a "changelog" topic or something that was easy to find. I don't see it with this game. Its almost guaranteed to be over 5 years old but like I said, I never noticed till today. Thanks IA.

The newest update is likely just a database / store website change. The next oldest was an update to the installer. This installer update is also the only one listed in the changelog in their Galaxy client.

Property changed: Systems changed from Windows, Mac, Linux to Windows, Linux 2021-04-08

Download changed: Installer, Eschalon: Book I, Windows, en Version None ⇒ 1.06, Size 114.3 MB ⇒ 110.1 MB 2018-02-09

Note:
If you use the GoG Galaxy software, click the button to the right of the Play button, Manage Installation, then Configure...
Change log is there. Sometimes not always detailed though.
You can also check gogdb.org. Keep in mind it is 3rd party and may not always be up to date on every game, especially very recent updates or brand new games.