What computer operating system is involved? Have you updated 13 to 13.1 yet using an opened project's Help Menu/Updates?
Are you watching a video tutorial demo's with Premiere Elements 13/13.1? If you are, you should see the headers E-Live, Quick, Guided, and Expert.
Do you just see "Default Caslon Pro 60" and not the rest?
If that is the case, then go to Documents/Adobe/Premiere Elements/13.0/ and the Styles Folder.
Delete the "workingset.prst" file from that folder. Then let us know if your Styles are now all present.
Yes I have Adobe Premier 13.1, Windows 10, and by removing the file "workingset.prsl", I now have all the styles available.Thanks a million
Great news concerning the recovery of your Styles when you deleted the "workingset.prsl" in the Styles Folder. Great job.
Your follow up is helpful to all those who find themselves in the same situation that you faced and are looking for answer.