Trial started great but now wont work

Hi,

I downloaded the trial and used Filter Forge with PS CS6 and was very happy with it. Then for some unknown reason when I click apply it takes about 10 seconds to display the progress bar and then it lags for a long time (10 minutes +). If I force quit I can see that FF has crashed. Even the textures that come with FF do this so not sure it's the filters fault.


I have tried this solution

Delete - Users/username/Library/Application Support/Filter Forge 4

These are my specs

OSX 10.9.4
2.9 Ghz Intel Core i5
8gb ram

This is great software, so If I can get over this bump i'll buy it. Thanks for any help in advance