Saves should continue to function normally.
What version did you have before?
What platform do you play on?
What error message did you get?
There are no issues with your save, it loaded normally.
This is because you have saved your game at the end of the chapter.
If you want to see the changes, load another save from an earlier point or play it in the Replay section.
v0.2.5 has no new content, it's just a simple update to include references to our recently launched Steam page.
You can see the patch notes in more detail here: Steam Page Launch.