Change label text for Address 1 using scripts

For Store/Site/MyAccount.aspx

Add in Bootstrap Custom Layout - Scripts tab

<script>
document.getElementById("spanAddress1").innerText="Your text";
</script>

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For Store/Site/Checkout/ShippingManualAddress.aspx

Add in Bootstrap Custom Layout - Scripts tab 

<script>
$(function() {
$("#ctl00_cphBody_ShippingAddress1_Label5").text("Your text");
} );
</script>

---------------------------

For Store/Public/MyAccount.aspx

Add in Bootstrap Custom Layout - Public tab

<script>
document.getElementById("spanAddress1").innerText="Your text ";
         </script>