I transferred all data to version 6 from 5 easily, however there were a few little bugs such as all my visual approaches were missing. With regards the log book file Mutt I can't find one either? Strange as in v5 there was one in the documents folder? If you are manually entering flights in bulk, it doesn't refresh the total time as quick as v5, I found myself adding up hours in my paper log book again to try and find the error until I found this out! A pain in the butt when you are faced with logging thousands of hours of paper log on to the software. Other than that, highly recommended!