Unforgivable ripoff! Use Apples free app or ANY of the others. Shameless attempt to exploit the virus for profit and filled with false positive reviews from shill accounts. from thier wbsite: "FAQ: I cannot open app.
Since our app is not signed (yet), you have to right click the app and click “Open”. Learn more."
And if you want to know about the compnay whois has this "Registrar URL: https://www.namecheap.com/ , Registrant Name: REDACTED FOR PRIVACY" as are all entries. Have fun doing further digging if you want