Adobe elements 2021 I have the disc it has been great until last week when it would not open my pics

Have wrked on this 2021 elements version for wo years and it has been great.

Last week it would not open and I was asked to try a 30 day free option which I signed as I needed the pics for business that day.

How can I get my original disc to work it is downloaded on the computer and I bought the disc in 2021

I still have it so I do not nedd a free 30 day trial to buy again