You can complete this action from the My Video page and the Manage Library page.

From My Video:
Locate the Misc/Exchanged Games folder:
Click on the circle to the left of the game [1] that you want to move, then the gear icon [2]:
Select Move Game:
Select the Season and the Game/Folder when you want to move to, then click Confirm:
To ensure the move was successful, locate where you selected to move to: