I tried to add somemore rules as I installed Galacticraft and wanted to sort Galacticraft items, but after I added some rules with the same name with existing rules, the game crashed. I erased everything I added (kind of restore the InvTweakTree.txt file) and reopen the game, the mod was loaded on main page but it wasn't in the game. And the game crashes everytime I go into a game with this mod. I don't know how to delete the InvTweakTree.txt file and I don't know how to reinstall this mod with every settings this mod created, what am I supposed to do?

Just deleting the file should work, it will be re-created from the default settings.

If it's crashing you should post the crash message at the very least though.

Kobata, I don't know where is the file located, how do I delete the file? Also, can I set up new rules with the same name (but different ID) as rules existed?

oh, I found out the txt file is located in the config file. The mod works again, thank you for your help.