personally, I've found that "installing" them just takes more memory.  I just open them into a folder, and if I want something from it I do an import, I do that now with all my 3D programs.... the more junk you install, the more these programs load at start up , the less memory you have to actually work with. Vue isn't as bad as some because it doesn't actually "load" the files, just some of the basic info, but still, it all adds up.

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Hexagon, Carrara, Sculptris, and recently Sketchup.