Battuto, welcome. I am very sorry you are having to deal with your daughter and her abuse. Abuse of any kind is not okay. You are the only one who can stop this runaway train and you most certainly need to stop it. You cannot change or fix or change or heal your daughter, only she can make that choice, so give up that notion completely.
Here are my suggestions. First of all get yourself some help, get into therapy, not to fix you, but to heal you from the tragedy of an abusive ex husband and an abusive daughter, to offer you empathy, compassion and understanding while giving you tools to shift this issue around so that you have the power and you set the boundaries you are willing to live with. You do not, on any level, by any stretch, deserve this behavior from ANYONE. You've now been in it for too long and what happens is that over a long period of time we begin to think this is normal...............this is not normal, this is abuse. And, it has now become violent abuse. If she hit you once, it WILL happen again. Abuse is incremental, the abuser escalates, you are now in danger of this happening again, only worse.
Go online and research how to evict someone in your state/county. Find out if you need to go to court and get legal papers drawn. If you do, start the process now. It takes 30 -90 days in some places. As soon as you have all paperwork ready, all the forms filled out and you know exactly what is going to happen and when, then find out what the procedure is to get a restraining order. Get all the paperwork filled out and ready to go. If your daughter lays a hand on you in the meantime, go directly to the police, file charges and get the restraining order.
As soon as you have all the eviction papers and restraining order documents ready, let her know she has x amount of days to find a job, get a room, whatever, but at that point, she has to go. Here in CA. we have to get legal court papers to evict someone, even our own child, and the day of the eviction you can have a sheriff show up and escort them off the property. If you have the restraining order in place, then if she comes anywhere near your property, you can now call the police and have her removed. If you do all of this now, when the next abusive issue shows up you will be armed and ready to go. This will give you your power back. Take it.
You cannot force her to do anything, all you can do is respond differently and make choices which protect you and keep you safe and offer you a different kind of life where you have peace and joy. You feel trapped and hopeless because she has used your love for her as a tool to manipulate you and scare you into being a victim of her choices...........YOU ARE NOT A VICTIM, you in fact, have all the power, it is your house, it is your money. Do not allow her to hold you hostage in your own home, you must set boundaries around this despicable behavior, because if you don't it will most assuredly get a whole lot worse. You have to stop it now.
Get support, find a therapist, find out about how to evict her, get a restraining order. You might even try calling a domestic abuse hot line and get advice from them. Once you take action on your own behalf you will cease to feel trapped and hopeless, you will begin to feel alive, powerful, liberated and free. Once she is gone from your home, you can work on healing yourself and creating the life you want to have. You deserve that chance, but only you can take it, so go take your life back................and do it now..............I am sending you lots of hugs and warm wishes for you to find your joy and your peace of mind................and I'm glad you're here, keep posting, it helps.