Go to the Design Studio.
Click Images and Files, then select the file you want to replace.
You can also search uploaded images or files.
Click File Actions and select Replace Image or File.
Browse to the file on your computer that will replace the current file, then select it.
If you’re unable to select a file from a shared folder, please save that file to your hard drive and choose it from there.
Verify that the file displayed next to Choose File is correct, then click Replace.
The name of the replacement file will change to match the previous file name.
You did it!