"You said in your response, "You can't reopen and litigate ...", so does this mean you can have your decree amended even though is has been finalized by a judge."
You can ask a judge for ANYTHING. I've heard of motions to prohibit the wearing of certain ties. I've heard of motions to smack a witness with the transcript of his deposition.
State law/court rules govern. If final orders were always subject to being reopened, there would never be final orders.
A whole lot depends on what was filed in court. If you filed ANYTHING with your address on it, and then moved, you likely had to notice the court of the new address.