The File Association Manager lets you decide which file types are opened in Photoshop Elements when you double-click a file’s icon.
Click the box next to the file type names to add a file type. Selected file types have a check mark next to them.
Click the Default button to select the suggested file types. Defaults may change depending on the other applications you have installed on your computer. For example, if you have Adobe® Acrobat® installed, by default Acrobat will open PDF files instead of Photoshop Elements.
Click the Select All button to have all available file types open in Photoshop Elements.
Click Deselect All if you don’t want any of the listed file formats to open in Photoshop Elements. This means that you would have to use the Open command to open an image file on your computer in Photoshop Elements.