A few nights ago a message appeared in Lightroom, but before I could read it, it shut down. Yesterday, I opened it up again to resume with my assignment and it said my files were damaged. On the third try I got my work and all went well. Today as I was looking at my newest images and flagging them, Lightroom shut down 'again'. This time it took every saved file and photograph. I noticed a weird file on my monitor screen thereafter, "DATA........Irdata. What is that? If this is where everything is, how do I get it back....and into Lightroom? What is happening?