I believe that DTH is no longer maintained. Using the stock DTH is best or up to date DTH like this one if you have access to rboy apps and you need access to any advanced lock features.
The stock DTH works fine for most users and you can use with the stock Smart Locks app for basic programming or you can check out this app for advanced features for lock and user management.
When you’re using locks it also helps to add buffering devices close to the lock, this improves the quality of the mesh. As a general rule for pairing locks, it should be within 5ft of the hub before trying to pair a lock; sometimes it may have trouble pairing with the hub if it’s connected via a repeater or if the signals are weak as it won’t complete the pairing successfully due to mesh timing issues and platform latency.