Z-Wave Association Tool not available in Smart Apps

Hey sorry, I’ll try to make the instructions more clear.

Are you following the instructions here: How-To's | Setup Z-Wave Associations - SmartThings

There’s a video that shows how to access the SmartApp:

Basically, you need to click the “+” sign at the top right and click on, “routines” and then scroll down to the bottom.

Hope that helps?