i have that same aircraft on win 7 FSX with acceleration and it shows several different versions. You do have acceleration or SP2 installed correct? You might try unselecting and selecting all variations.
The files did install into the fsx/simobjects/airplane folder? You should have 6 "aerosoft_PBY_???" folders , the ??? are different versions.If not you might be having a permissions issue. Try reinstalling with the installer running as administrator.
It is a great aircraft, takes some getting used to. There is an update for it, not sure if you will need it, depends on how current yours is but worth checking with them.
I5-2700 3.10GHz,Dual AMD Radeon 6850,6 gb Ram. Win 7 64, ASE,AH 3 X 32" monitors, 1 17 inch.