I have been running lg 3 on parallels and have purchased lg 4. After reading some of the problems encountered by some on this site, I think I would like to load the new books I have purchased into lg 3 and then once they are in my library, try to load lg 4 and see what happens. Has anyone had any problems loading lg4 into parallels? Is it better to upgrade on line or by disk? Are there any adjustments to Parallels that have to be made to run lg 4? Thanks