You are running Windows 7 right??

do a file search for" Runtime ", on all HD if you have more then one.
Normal instalation you will get 2 returns.
One in the programs folder and one in your public folder.

probably you are a victim of Win7 UAC putting the files in your public folder.

In the library, point to the Runtime in YOUR public folder. That si the runtime where all pser stuff is.
NOT to the runtime in your programs folder. (that one is indeed empty)

Poser, will build its preference files during first launch.
Check for a Poser.ini, after a first launch.

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!