here's a trick, download and install the latest files from ragray.net into another folder. Once it's done, download and install the heRO mini installer into the same folder.
Normally you'd need to wait for the patch to download, but now since you already patched everything and the original ragnarok folder is still intact, just copy the folder that contains all the patch updates into the new ragnarok folder, patch and it'll repack the patch updates instead of downloading. Once that's done you're able to access to heRO again, and you can get and use all the hats available. Simply delete the old folder once you're certain the new one won't crash and burn.
I think I'm finally going "home", renewal is fun, but there is really nothing like "heRO"...
Kyarorain, Shield Crusader
Erizabeth, Battle Sage
Derpette, Int Brewer
Katerine, Battle Acolyte