How do i remove crown? I am trying to remove the movement from my watch so i can replace a digit

Question

I am trying to remove the movement from my watch so i can replace a digit that had come loose from the face.
So far I have removed the case back, removed the white plastic movement surround/ casing. The movement is now loose but is prevented from being taken from the case by the crown shaft/stem.
Can anyone tell me how to remove this?

Also the mineral see-through glass case back is cracked and I am trying to locate another, new or secondhand???

Thanks. Model is WAC1113 XM2356.