I'd advise to never let any Poser version to use libraries on Windows folders, yes. I've been avoiding that for years. Me thinks the installers shouldn't ever suggest to put them there, but I think that's a problem that gets overlooked with new versions.

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Feel free to call me Ohki!

Poser Pro 11, Poser 12 and Poser 13, Windows 10, Superfly junkie. My units are milimeters.

Persephone (the computer): AMD Ryzen 9 5900x, RTX 3070 GPU, 96gb ram.