Nicsmom15, there is a red bar New Thread button above and below the posting area. You deserve a post/thread of your own so first welcome and second, for your question -- I'm sure someone has!
I've had to rebind many quilts due to age or other issues. Depending on what the issues are/were, if I really hated my binding I'd be more likely to take it out or by cutting off most of it and simply putting a new one one. but I have covered over worn bindings with fresh. While they rarely get fully attached, I'm sort of notorious for changing the size or fabric or something on my borders and bindings at the very last minute.