Problem: I am not able to download Mathcad

I am a student who purchased Mathcad Prime 5.0 student edition in January 2020 and I still have until the 28th of January 2021 until it expires. I recently got a new computer and I wanted to download Mathcad 15.0 onto it but when I go to the link provided in my email from the product code, it says I do not have any software to download. I am confused on where I can download it onto my computer, and why PTC says I don't have Mathcad Prime 5.0 student edition. any help would be appreciated!