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Decrypted_TitleKey = AES_CTR(Master_Key, IV_Header)

This review refers to a specific version of (prod.keys) intended for use with emulators like Ryujinx and Yuzu .

The only strictly legal way to obtain these keys is to dump them yourself from your own modded Nintendo Switch console using tools like Lockpick_RCM. Using keys found online is generally considered a circumvention of copyright protection.

Clear the shader cache for the game, as old shaders can cause conflicts.