For those who are trying to re-enable Alexa and do this stuff once in a "never", On the App, main Home page, at the bottom, the 3 lines, tap that, select Skills & Games, and in Search Alexa Skills, type isy, and select the appropriate one for you. For me it was the "isy optimized for smart home v3" I needed to select Re-enable, log in info entered, and then it errored saying it couldn't find anything new, but everything began working at that point.