Fritter

I tried a search in the forums but couldn't find an answer. My father in law caused some damage to the cloth splashguard under the body which will need to be replaced. For the life of me I can't seem to figure out how to get these clips off (without destroying them). I see the centre pin with the small tab. It looks like the clip is grooved to slide off but is there a special tool or procedure to get them off?

Thanks,

FF