VideoStitch might provide you a coupon code to benefit from a discount. The coupon code is tied to the product for which it has been provided.
In order to get your license key please visit the VideoStitch Studio product page https://www.orah.co/software/videostitch-studio/ or the Vahana VR product page https://www.orah.co/software/vahana-vr/.
Click on buy, it will open a new window.
Click on "I have a discount code", enter the voucher code and apply it:
Click on "Place your order"
You should receive your license key a few minutes after.