FF6 Standalone version ok, PShop CS5 plugin not ok...

Hi ~ I have recently stepped up and purchased (FF6.008 I think), and love it! I had been using the trial version for a few weeks previously, and it worked fine in Photoshop CS5 Extended and in the standalone version. Now that I have registered and got the real version, it no longer works at all in PShop. Instead, I get the message "Could not complete the Filter Forge 6 command because of a program error."

Could someone kindly tell me how to fix this? -And if it means reinstalling FF, is there a way I can keep my delicious collection of filters that I have already downloaded from the FF filters candy store, without having to re-download them all?

Thanks alot in advance for any help offered