Try this
Download the launcher from http://fgunz.net/FGDownload/ [Bottom One]
Run the launcher you just downloaded.
When it is done patching, 5 things will be there. [fmod.dll, patchlog, [x]Freestyle.dll and System.xFC]
Copy and paste these 5 things into your F-Gunz folder [ C: > Program Files > Freestyle GunZ] If it asks to replace, click yes.
Start Gunz, it should be fine now.
