Just seen from your down load screen the gas flow set at 100% so the ecu does have gas control. You will have to experiment, at the moment the ecu is just leaving the gas flow full (100%) I would set it to 80% then open your gas can a small amount a time until you get reliable starts, then mark the knob on the can so you know each time to open it 1 turn etc.

Down the road as you gain in experience you will find you dont even need to fit a gas valve but for now it should make things more reliable and safer to have it there.