Great plugin, but confusing.

My use of Fancybox plugins goes more than 10 years. I started using the Easy Fancybox when another Fancybox plugin was updated and broke all my captions. However, recently the tables were turned and had trouble with captions in Firelight Fancybox , after a WordPress update. I find the present version of Firelight Fancybox with its alternatives: Legacy, Classic and V2 confusing as I have long since forgotten the differences between them and there is no clear description of how they differ. I wasted time trying each and then reverted to the previous simpler Fancybox , which worked right away.