High Level Instructions
Install the required files for your Smart Home Hub
SmartThings
Hubitat
On the Wink Relay (achieve root and install the custom app):
Root your Wink Relay
Note: See the Rooting Instructions section below for details.
Install the STWinkRelay.apk custom app
Note: You can either do this by opening the STWinkRelay APK using your web browser (if you still have it) or install via ADB. For the web-browser approach, make sure you have "Unknown Sources" allowed for installation.
Open the custom Wink Relay app at least once
Note: If you have root management enabled, be sure to approve the permission request on the physical device before the timer runs out.
Note: There are a number of services which run in the background including device discovery, services for watching the sensors and buttons, and a web server for your Smart Home Hub to send commands to the device. These services are set to automatically start when the device is booted, but you may have to open the app once immediately after installing it in order to kick off the services.
Discover your Wink Relay devices in your Smart Home Hub
SmartThings
Hubitat
You should now have a working 'Wink Relay' device in your Things list! Open the device from your Things list and tap refresh to make sure everything is synced up.
cd C:\users\{youraccount}\Downloads
adb install -r {{fileName}}
Note: You will either have to have ADB in your path or have ADB accessible in the same directory in which you have the APK downloaded. If you have installation protection enabled from KingRoot, be sure to approve the installation physically on the device before the timer runs out.
Use the Wink Relay wiki entry on ThingsThatAreSmart.wiki as a reference: http://thingsthataresmart.wiki/index.php?title=Wink_Relay
Important: Stop at step 32. You should not need the Root Package Disabler or any adb commands for this project.
Tips and Tricks:
If anyone wants to update the Things That Are Smart Wiki entry, please go ahead and do so! The original wiki entry author posted in this thread that they are supportive of that decision.
From the Wink Relay:
It will try to download and install the update, but won’t be able to complete it
Alternatively, you can download the APK manually via a web browser on the Wink Relay (or install via ADB).