Added a GUI where you select a save method for custom items: By NBT or By Item ID.
By NBT saves the entire item NBT data to the config file with a compatibility for newer MC versions and possible NBT changes. However, it does not reflect any changes made in its original plugin's configuration.
By Item ID saves the unique item ID from its original plugin and always reflects all changes made in its original plugin's configuration. However, it does not save any changes made out of said item configuration file.
This GUI will appear on: crate item change, key item change, reward creation, adding item(s) to Item Reward.
ADDED:
Missing lang entries for editor GUI titles.
Command flag '-sf' to disable command feedback to the command sender.