This update fixes the Advanced Workbench and the Knowledge Book.
The problem was that the config of both of these items where broken.

The configs for the items are updated in this version.

If you haven't encountered the problem yet, that means your item configs aren't broken and you could also ignore this fix. However still update the plugin it also contains some performance improvements.

Instructions for the Fix:

1. Stop your Server

2. Download this update and put it in the plugins folder

3. goto into the folder plugin/CustomCrafting/recipes/customcrafting/items

4. Delete the knowledge_book.json and workbench.json file

5. Start the server. The new configs should now be loaded and the crafting recipes will return the correct items now!