Unfortunately, you are going to have to figure it out again. 
Smartthings is in the process of transitioning to a whole new architecture, and anything that used custom groovy code, which includes both custom DTH’s like the one from @bravenel that you were using, and custom smartapps, such as advanced button controller, will not be able to use that Groovy code anymore.
The intention is that devices will be automatically migrated to new “edge drivers“ which substitute for DTH‘s and run on your own hub. But that can sometimes mean a loss of functionality.
And the custom smartapps just stop working. 
You have to rebuild routines for the devices that use them. That may be fine or, again, you may lose functionality.
I know that’s a lot to take in. I’m still surprised that smartthings didn’t send out individual emails to everyone telling them exactly what on their account would be affected, but they just made a general announcement.
Anyway, you’ll have some research to do.
Start with this:
Why Did My Integration/SmartApp Stop Working in January 2023?
Then this, and that should catch you up:
FAQ: I have no idea what Edge is. Is that a new developer tool? (2022)