First, you'll want to make sure the first day of the Blue-Roads itinerary you're importing corresponds with the day you've selected in Travefy. Then, click "+New Event" and then "tour" from the drop-down menu.
Next, type in Blue-Roads for the supplier and enter your product code. Then, click "Get Itinerary".
Next, you'll see a preview of the events that will be added to your itinerary. You can then add them to your itinerary.