If I type in any integer into the list and launch Minecraft, the config file completely resets to default (all settings reset). So basically blacklisting enchantments doesn't work.

MC version 1.10.2
EP version 1.0.118
Forge 12.18.3.2422

Hello, the blacklist does not use integers for IDs. They use named IDs, similar to items, blocks, entities, biomes, and so on.

Named ID's has the same affect. For example, typing in minecraft:mending into the list will also result in the config file resetting to defaults.

How are you entering them into the config file? The file regenerating would only happen if you make an edit that breaks the structure of the file. Here is a working example from my test config file.

    S:blacklistedEnchantments <
        minecraft:sharpness
        minecraft:unbreaking
     >

Oh, I see. I did not realize it was that strict. I got it working now. Thank you.