RE: Super New
Hi...
First off, read the instructions! They will tell you how to launch your plane.
I am not familiar with that model, but I do have a HZ SuperCub and here's what I do when I hand launch- full throttle on a fresh battery, trimmed slightly for up elevator. I give it a firm but not excessively hard toss. If I toss the plane level, it will stay in the air and gradually climb. Do not give it full up elevator from the hand launch until you're familiar with the plane's characteristics. Depending on the plane, it'll probably stall out and you'll be on the ground before you know it.
I suspect when you flew it last, you gave it too much up elevator.
I bought my HZ SuperCub at A&J Hobby which is at Main Street & Kennedy Road in Markham (behind Markville Ford) but I doubt you need to get a new plane. You should be able to fly what you've got with a little persistence.