Hi @kSpy62 & welcome to the forums! 
Have you tried using the search functionality in Windows Explorer to find the folder?
Because users can choose where to install MSFS, I can’t give you a definitive answer of where to find the folder (plus, I’m using the MS Store version), but the default install location for packages on steam is:
C:\Users*YourUsername*\AppData\Roaming\Microsoft Flight Simulator\Packages
so you might start your search there.