I've been using K4PC version 1.2 on my desktop so that I can deDRM books, so I haven't kept up with the newer versions. Today I heard the newer versions have Collections so I installed K4PC version 1.8 on my netbook to play around with it. I created some Collections in K4PC version 1.8 on my netbook, then went into the
Add Other Device Collections menu on my K4 and discovered that my netbook is listed as a device from which I can import Collections to my K4. That means we can now create Collections on a PC via K4PC and then import them into a K3 or a K4! Perhaps this has been around awhile and I never knew it. But it certainly makes managing Collections on a Kindle much easier, especially the new non-touch K4.
EDIT: @Blossom just told me this feature has been around for a while. So as Gilda Radner used to say on SNL, "Never mind..." It is still new to me though and it will definitely make managing my Collections on Kindles much easier.