Hi!
What antivirus were you using? On PC, you might need to right click the application -> Properties -> Unblock. On Mac, you can click System Preferences -> Security and Privacy -> General -> Allow.
If possible, could you fill out the survey, as it gives me info about what to improve? Link: https://goo.gl/forms/dNKoWzAWF43Z5zOq2
Thanks!
ProjectTetraDev