It most probably is a file association issue.  Often when a new program is installed on the computer part of the installation process involves associating certain file types with the installed program.  In the case of graphics programs this involves .jpg, .bmps. tiff etc.  If you cant find in Elements preferences somewhere to 'disassociate' file types then you can do it through Windows Explorer.

Open Explorer
Click Tools > Folder Options
Select the File Types tab
Scroll down to the file type you want to disassociate
Click 'Delete', or 'Change' if you want to open the graphic file type in another program on your computer.

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