Beck, this is what I will do. Uninstall both Vue version. Go to "C>" and edit the registry ("regedit")...in the HKey thingy, anything you see "e-on" or "Vue" in the "software folder"...delete them all. Not sure if I should recommend you this unless you been at it before..a thing they call "cleaning your registry" where you can actuall messed up things too....LOL! Anyway, if you know, go thru all the HKey/Software folder and do the same. Quit back to Window, shutdown and then reboot. Installed both Vue 3.1 and Vue 4, each on their own. Proceed with the necessary patch for Vue 4. Check at e-on site...not sure when, but there was a corrective patch file for the "Vegetation Bundle" to work in Vue 4. Hope I'm not helping you to messed up more. Good luck :) Bill