Logos Hanging/Crashing When Opened

I’m trying unsuccessfully to start Logos. I get only a blank page and the indexing notification. It does not index like normal and nothing loads on the home page. I tried pausing index with no response from the program. I used forced quit on the program several times, and restarted my computer. The result is the same each time. Below is a screen shot. I also used the Logos Logging Utility and attached the file. Today is the first day of a new course and my textbooks are in Logos. I'm not panicking yet, but please advise as soon as possible. :-)  Thank you! Susan