An employee of ours has given notice and leaving for our largest competitor just days before we're about to launch our main product. Since we are a small team, she is critical to finishing it for launch. Finding someone on such short notice will be near impossible. What would you do?
You can sue - or threaten to sue - based on what your non-compete clause says and what state your agreement is enforceable in. See Non-compete clause and determine whether the effort is worth the time / dollars. A lawyer is key here.
IF she has given notice the possibility or getting her to stay might be there - even though she likely has mentally moved on. After determining your legal rights (and discussing with counsel), you may want to notify her that she did sign a non-complete clause and that you intend on enforcing it.