"Get from ECU" means "getting" the program that's in the ECU to your laptop. You only would chose "Send to ECU" if you had made changes offline, and then want to upload those changes to the ECU. You won't be doing that.

When you click the “USB Link” and are online (Button will say online), a screen should appear that compares the files in the ECU with the file in your laptop. They will not be the same because the ECU has learned. You want to click the "Get from ECU” button at the bottom of this screen. This will send the ECU program to your laptop.