Pictures have disappeared

I am working with my pictures in the Organizer in Photoshop Elements 2019 and have many albums and tags on thousands of imported pictures. But now when I open the program it looks like when I started using the program i.e. only the pre-defined functions but none of  the imported pictures in the albums and tags I have created. It is like I am in the training module. Hope someone know how to get back to my version. Unfortunately no back-up