Before I go forward with a fix like this one, are there any alternatives to moving the strike plate when the amount of adjustment needed is minor (the door will latch if you lift up on it). I believe the misalignment is caused by sagging as the sill plate that was replaced 3 years ago has dried out (the door was reset and worked perfectly at that time).
Can I place a small shim (perhaps 1/16") behind the lower hinge? The door swings easily and doesn't move on its own right now, I'd like it to stay that way if possible.