I have 5.2.0. I just upgraded it from the version that came with my KOMPLETE6 Audio Interface (which is great btw).
I did discover something. The VST seems to take it's presets from a folder in My Documents.(no idea why, unless I did something stupid, I never would have looked there) The standalone seems to draw from a programs / common files location. But, like I said, the user preset names are THERE, in the VST version. The user presets are THERE in both directories, the user presets just don't work in the VST side unless I make them there. If they were missing from one of the directories , I could say," AHAA! I know what's going on", but that isn't the case, which is what confounds me. I found a regedit solution in their knowledge base. I am going to first try importing all the files from the standalone's directory into he VST, per your link. That is kind of a pain to manage them that way, but it beats creating them twice. Then I will try deleting a line in the registry and make it go look again ,as per the directions they describe. If that doesn't work, I am going to uninstall/reinstall the whole thing. At this point, spending too much time trying to fix this is more of a mental exercise than a practical measure. I want to play guitar, with all the cool amps and toys, not program my computer : ). I love Guitar Rig's basic concept, sounds and interface, it just sucks if I make a preset in the standalone version and can't use it on a track 'cuz the VST side can't read it. I'll post back with progress, and thanks for helping. Maybe your import solution will work, it's worth a try before I scrub the whole thing and start over.
Tim