Try the apps listed in the Wink Relay ThingsThatAreSmart.wiki article. Specifically:
- Assistive Touch for Android (Assistive Touch Team)
- Google Chrome or Firefox
- Nova Launcher (TeslaCoil Software)
For the time being, when your Wink Relay reboots it will ultimately try to load up the Wink Relay software, so setting up Nova Launcher before the update and having something like Assistive Touch in place to let you go back to the launcher is important.