Mathcad Starting and Login and License problem

I created a ptc account with my school email addres. Tried logging in into the MAthcad programm but that didnt work. So i tried with my private email(@gmail) obiously the license key i got from my school does only work on my school email. now i am having problems logging in into Mathcad and the programm doesent even work. Only the Mathcad Setupwizard works. What can you do? Maybe delete all of my information so i can clean restart and create a new account with my school email and try again?