You will be endlessly annoyed by this as well.  No matter what you do, Poser always enables leg IK when loading a figure from the Library.  You can make (or find) a little Pose file that turns them off - that's about it.

I'm endlessly doing this same thing - load figure, go directly to Figure menu to disable leg IKs.  How hard can it be to add a preference switch to change this behavior - it might take an entire hour!

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

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