Oh, Looks like I may have answered my own question.
In desperation after writing my question just now, I deleted the app from my phone because I could not get to the log in page because the dumb program (I guess) wouldn't let me do a "Test Run" once I had started setting up the controller but was stuck because I couldn't hook to WiFi 'cause there is none yet.
But upon deleting the Netro App from my phone and then getting it again from the Apple App Store, now I CAN get to the log-in page and, lo and behold, there is the Test-run button at the bottom of the page!! Obviously it should be accessible from inside the setup if there is no WiFi available too!!
im not at the site, and it looks like I need to be in bluetooth range so i will go there now (before the lockdown for the virus becomes more total, as many expect) and hopefully it will now work and the landscape will be safe for at least a month. I will add another answer once I see if indeed it works.