1.25 is an old fan patch and should not be used as JJ2+ improves upon it in every way possible.

Abandonware is not legal - there are no legal free versions of JJ2. However, no one really cares about that at this point.

Linking to places where you can download full versions of JJ2 as explicitly as you did is still forbidden on this site though, as Epic does not allow that on fansites for its games.