If you don't mind spending a little more money I do believe you can get the upgrade version with the install media/DVD for $69.99. Staples and FutureShop have them here locally on the shelves. Make an ISO from the DVD and then use that to make your install thumb drive. I do believe there is also workaround to let you do clean install with the upgrade media. I'll have a look for it and add it to my post when I find it.

EDIT: I didn't see anything in the tutorials so I'll just let you Google it when you decide which way you're going to go.