Board Thread:Questions and Answers/@comment-35715369-20180702131954/@comment-28905095-20180703080401

It's possible to remove resource packs without opening the game, but you do need a file explorer.

Basically he has three options currently: 1. Await a new update 2. Remove resource packs 3. Reinstall the game

The last option could jeopardise his saved games, so a file explorer could/should be used to make a backup of at least his saved games folder.

Guides for doing any of these operations can be found online