What computer operating system is involved? Is Premiere Elements 11 and 13 on the same computer.
And, if you archived the Premiere Elements 11 project, did you follow File Menu/Project Archiver/Archive Project or Copy Project?
If you selected Archive Project, you saved a folder named Trimmed.
If you selected Copy Project, you saved a folder named Copied.
For now I will assume that the programs are on the same computer.
Open the saved folder either Trimmed or Copied. Find the project file (.prel), right click it, and, from the pop up menu, select Open With, followed
by Adobe Premiere Elements 13.
Does that work for you?
If I have not assumed correctly your missing details, please supply the details needed for me to help you.
Add On...the following is information on archiving project that include disc menu.