how do i create a desktop icon from game i alr

How do I create a desktop icon for a game I already installed? 

I downloaded the sims 2 ultimate collection, I don't have any hard copies since this was a sale on origin a few years ago. I forgot to click "Create desktop icon" when installing. 
My main issue is that the game is too small for my monitor and it only has one setting, So I was going to put that in window mode but I cannot do that unless I have a desktop icon. It took me 8 hours to download the game and I don't want to have to do that again. There is no .exe file in the sims 2 folder. ( Windows 10)