Crafting Recipes - Terraria - GameFAQs
Drop all the stuff you want to use (ie: hardmode ore bars, souls, gems, etc.) and pick them back up. That should register their ingredients and reactivate the recipes in your crafting menu. If that doesnt work (which it should), build a crafting room and warp your guide in there and use him to make what you want. Psn: BreakfastSage.