For Premiere Elements 11, 12/12.1, 13/13.1, and 14, you download your content for the program from within an opened project.
You do not get them by going to the Adobe web site direct or going online to an Adobe web site.
The following link for 11 applies to your 13/13.1 also and describes this Content Download
Please let me know if you are OK with the above information or if you are seeking something else.
Any questions or need clarification on the above, please do not hesitate to ask.