Welcome to the new forum! We upgraded our forum software with a host of new boards, capabilities and features. It is also more secure. Jump in and join the conversation!
You can learn more about the upgrade and new features here.
The only way to update existing recipes is to open each recipe and 'substitute' the old ingredient for the new one. I do this every time I open a recipe to check it before adding it to the brew log folder.
Not anything that does a blanket change, but not hard to change individually. I assume you're talking about the hops you already have. Click on a hop addition in the recipe and select SUBSTITUTE. Click on the updated listing and select OK. Do that for each addition and you're set.