The library too often has problems to seemingly to refresh something,  it' sometimes not starting with all buttons, tedious even though I used the settings that should be make an easier start. The pre P8 library always opened in an instant when you wanted it, always. How can a newer software be slower in reacting on your clicking? I gave up and started to use the Shaderworks Library Manager instead. And I changed the Poser.ini to this

LIBRARY_IS_AIR 1
NO_LIBRARY 1

Now it's vanished.