My library does not show my galleries that link to my hard drive anymore? Where are they?

Ugh I really do not knwo how to explain myself. I am a photographer. I usually go to lightroom classic click LIBRARY at the top then over on the left under FOLDERS I usually see a long list of galleries that are on my hard drive. I access them there edit etc. 

But I had an editor help me with some editing. She sent me the lcat files and I ended up double clicking the lcat file, lightroom restarted and it only showed the galllery she edited. The rest of my list is gone? 

How do I get back to my edits and links to my other galleries. I am trying to stay level headed and know there is a way to get back there to my 25 or so galleries... please say there is a way! 

I added a movie hoping it would help you understand what I am asking