Yes, Poser 8/2010 uses Air and/or Flash. Missing or outdated flash is almost certainly the reason for the blank library in P8. Poser 11 does not use flash. Coming from P8 one of the alternate starting screens may be more familiar. Make sure you've installed all the content for P11 then start a new scene. Then go to the Scenes section of the library and find "Poser 11 Environments". Load the "Poser 10 workspace". If this feels more familiar you can make this your loading screen in preferences. Edit >Preferences > Document > [Set Preferred Scene]