
Just to add to Teri's great advice, if she really isn't keen on her feet being touched full stop, then start by getting her used to that again - touch her paw - give a treat, when she is relaxed about that then gently hold her paw gently & give a treat, when she's relaxed with that increase the time you keep hold of her paw (don't forget treats), then get her used to more pressure as you hold her paw (as you need a firm, confidant hold when you build up to cutting the nails). Then you can start to introduce the clippers/file.
With LOADS of patience, persevearence and always trying to end each session on a positive (before she gets stressed) you'll get there.
My pup was a nightmare to get used to the nail clippers - he hated them and would try to grab them off me, what also helped with him was a 'wait' command - I would put a treat in front of him and he had to wait until I touched/held a paw or clipped a nail before he got the treat. Now he loves having his nails clipped and as I've always tried to make it relaxing for him (talking in a soft, relaxing voice), he'll often go to sleep while I cut them with his paw is in my lap - bless him, the big pampered baby LOL!.
ETA, I would always only try the nail-cutting 'training' when Buster was calm already not quite ready for a sleep but while he was 'chilling out'.