So I just swapped out the hard drive on my computer. This was a bit of a painful process because I used this opportunity to do a completely new install of the OS and all my apps. The most painful part is re-establishing the personal settings I have for each of those apps.
But it was easy with Logos 4. When I re-installed it, my Reading Plans, Preferred Bibles and Layouts were all there!
I guess they must be stored in my online Logos 4 account profile. That is a very nice feature. Thanks, guys! 
