I am running MSFS 2020 and FSFlyingSchool for MSFS in Windows 10. On the Flight Plan Page of FSFlyingSchool I clicked "Load Flight Plan" so that I could load a previously saved flight plan (xxx.pln). I get a notification that I need to go to the Setting page of FSFlyingSchool to create a "valid" folder, but I see nothing in the Settings tab that is related to flight plan folders or how to create or select such a folder. I do have a folder containing MSFS light plans with the .pln extension: the file path is correctly stated in the text box in the Flight Plan section at the bottom of the Settings tab. Thanks for your responses.
Monty May