Once you open the app the first time from the “My apps” section and save any changes, you’ll have an entry for the Lock Manager app on you list of SmartApps in the Automation>SmartApps tab.
Once you’ve done the initial app setup do not go back into the “Add a SmartApp>My Apps” flow to open the app again. Simply scroll down on your SmartApps tab and you’ll see Lock Manager listed there.
From that point forward always launch the app from the icon in your SmartApps tab under Automation.
To clear up your issue of multiple instances, tap the icon for the second instance of the Lock Manager icon in your SmartApps list, scroll to the bottom and hit the big red “Remove” button and confirm removing that instance of the app.
Then tap the remaining Lock Manager icon in your SmartApps list and confirm all the settings/codes are as you want.
You are going to have to get someone to test it locally to confirm 100% that it is working - there’s no way to 100% sure of any automation unless you can verify it directly - that’s true of any home automation.
If you set up the correct DTH from the other Lock Manager version, that will work w/this version.
