Read down from this post (link). It sounds like they do update by themselves overnight (or are supposed to). Apparently the only other hub that updates only the motion and contact sensors is SmartThings.
Update what you can would seem prudent and then get as much money back from Lowe's as is available to you.
You might be able to update these with a Wink hub. They do their update automatically over night or in a day or so. You can usually find the gen 1 Wink hubs for cheap.
