(Regarding IKPM freezing)
After a looong time swearing at my computer i tried running the IKPM via right clicking the shortcut and clicking "run as administrator" now it works great! Im on windows 10.
after this i went into the properties of the IK Product Manager shortcut and in the Compability Tab marked "Run this program as an administrator". so next time i can just double click it directly.
havent read this anywhere else (that i know) - hope it helps!
I had to do this even if i am in fact an administrator on my computer.
Cheers from Sweden!