Yes, exactly @michel, I was "migrating" from V2 to V3 (to attempt to fix the "Device Not Responding" error), and the instructions in the Wiki say to find the V2 skill in your Alexa "app" ... however, the V2 skill is NOT listed there (see my previous posts about this issue -- I spent half a day trying to "migrate" from V2 to V3 because of this problem).
So, we were suggesting that you change the Wiki instructions to add the fact that the V2 skill may not show up in your Alexa "app", so you can find it at this link instead:
https://www.amazon.com/ISY-Optimized-Smart-Home-V2/dp/B01FGS66D0
Let me know if you need further clarification on this issue. If this information had been in the Wiki, it would have saved me many hours of troubleshooting, duplicated devices, and plenty of frustration.
Thanks!
Stuart