granny pc 1.3.1

Can you provide more context?

If you mean you want to speedrun this difficulty, then you still can. You just need to submit your run into the non-extreme mode category. As, per its rules, these categories allow all difficulties, apart from extreme mode.

However on door ending runs, your time will be slower due to the extra locks. So you could just play on extreme mode for door ending at least.

I'm not sure if being on hard mode affects other endings or not, but Granny might get in the way more often.