In this version I've fixed/added:

• Success out feature - determines what % of the ingredients are returned. For example if you have success-out.percentage set to 50 (%) and recycle a diamond chestplate, you'll get 50% of the items back so 4 diamonds. (Feature requested by @JorgeMCS16)

If you want to use the new feature, please add the following to the end of your config.yml:
+ set success-out.enable to true