How to move an ongoing game into a new folder???

How does one move an ongoing game into a new folder? or is the new folders feature ONLY for archived games??? not clear, to me ??? thanks😀:'(😴🙄😲😵:'(

MyGames page:
Manage Folders, create whatever folders you want.
Manage Games, tick the games you want to move, click Move to Folder and choose the destination you want. The ticked games will move to the designated folder.