lightroom trial

I was able to download this and use this system once. It was really great. I went to go and add some more photos to it, and went into FILE, and then I went and hit OPEN CATELOGE (thinking that meant opening up a new folder of photos, because I didn't want to overwhelm the system). After that it turned off, and everytime I went to open the program back up, it would say "Adobe photoshop lightroom 64 bit has stopped working" A problem caused the program to stop working correctly. And then it says "Opening Catalog: 6920_254775715253_863210253_8884109_238631_n. jng.lrcat"

Can someone please help me out with what this all means. I have 27 days left on my trial and I would really like to figure this out and have it fixed before that.

Thank you very much