MacPhun LLC, a leading developer of iOS photo and video apps, has announced an update to FX Photo Studio HD, the most dynamic photo processing app available for the iPad. The update will include more than 53 additional new effects, giving FX Photo Studio HD the largest variety of photo effects and filters of any app on the iTunes App Store. As our App of Day, all our regular readers know the trailer for this app will feature on every page of our site for a whole day. Just scroll to the bottom of this page to take a look.   Along with a myriad of new effects, the update…