Sub-hour is not a hugely difficult goal for this category, but it's a great accomplishment to brag to your friends about. If you are able to downpatch to 1.4.0.5, that is likely the faster version, due to the lack of having to get Chlorophyte and an Adamantite/Titanium Forge. However, if you are unable to do this, 1.4.1 still has the advantage of beginning every run with a grappling hook, which can save almost as much time. Good luck!