diff --git a/main.js b/main.js
index 72fd0cf..bb1266a 100644
--- a/main.js
+++ b/main.js
@@ -1264,14 +1264,15 @@ function migratelegacystorage()
 	var legacy = localStorage.getItem("data");
 	if (legacy)
 	{
-		var legacy = JSON.parse(legacy);
+		alert("Old data model detected. Click ok to migrate, or close app.")
+		legacy = JSON.parse(legacy);
 		var index = {};
-		legacy.reverse().forEach(note =>
+		legacy.reverse().forEach( (note, i) =>
 		{
 			var guid = genguid();
 			localStorage.setItem(guid, note.content);
 			note.header = indexheader(note.content);
-			note.lastchanged = Date.now();
+			note.lastchanged = i;
 			delete note.content;
 			index[guid] = note;
 		});