Cleaned the registry, archived all my presets and scenes, uninstalled Bryce 5 and 5.5, and then reinstalled them both. Bryce 5 installs but when launched displays the "invalid serial number encountered. Please..." message. The serial number used previously (the one used to install) will not work. Bryce 5.5 works but still won't import OBJs as separate sections, although the very same OBJs imported into Bryce 5 that way just fine, along with their figure names. The colors in 5.5 look washed out too. This is weird. Maybe it's time to get Vue.