Asking for activation code again

I purchased a TT 2019 license from Costco and started my taxes back in early Feb.  As normal, everytime I open TT, it checks for the latest updates.  I just updated as tax submission date has changed.  Now after the updates, I cannot access the application as it's asking for the activation code.  I now longer have the code as I tossed it in the trash after installing it on my laptop.  How do I get past this?