I must say, I've had nothing but problems with Smartscreen, so eventually ended up just turning it off.
Just as an FYI, Windows 10's Edge does not allow you to report as Safe, only as Unsafe.
You will need to Open With Internet Explorer to be able to do this.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem