Topic on User talk:AlphaYellow
> Yes, I tried it before, but the new versions never show up in the articles somehow, unless I change the file entirely
You need to purge the cache (More->Purge Cache), sometimes several times.
> Oh sorry, they need to have the same extension as the original one?
Yes. If it's JPG image it can't be replaced by PNG image and vice versa, but in this case both were PNG so it's possible.