It shouldn't affect anything Stevie, I did the upgrade as well.

P6 installs to Curious Labs/Poser 6, P7 installs to e frontier/Poser 7 by default. There's no chance of overwriting P6 unless you change the install path (definitely not recommended, unless you're putting P7 on anything but your main hard drive).

And I'd recommend against people uninstalling P6 just yet. There will undoubtably be the kinds of problems experience with an initial release of software, and if the program ends up unusable it'll save you the trouble of having to reinstall P6 just to use a version of Poser.

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If you're joking that's just cruel, but if you're being sarcastic, that's even worse.