Start the EFD software then go to FILE > Open, or click on the Folder Icon along the top left of the screen as shown below.
Navigate your folders to find your drawing, then click Open.
Double click on the drawing in your File Explorer:
Start the EFD software then use the Recent Documents List by clicking on FILE > then hover you mouse over Open, wait for the Recent Documents to appear then click on the drawing you want to open.
TIP: Hover your mouse over a recent document to see where that file is saved to make sure you are opening the correct file.