So, just to summarize. When running in standalone (as administrator), everything looks OK. But the VST is missing everything in the left pane. The license is OK in the VST, SONAR is running as administator and you have used Guitar Rig LE since re-installing it.
The only time I have seen a problem with presets, it was an installation issue. I can only think of a few things to do. Log onto the NI support site and make sure you are running the most recent version. I never installed GR4LE so I can't see the version number available at the NI site. If there is a newer version, install it. If not, short of a reinstall, I am out of ideas.