OTE 1: Always click the blue "Write CFG" button in the top-right to save your configurations. This must be done before closing the Configure window.
NOTE 2: You HAVE to run the game from FF7 Bootloader to get the fully modded effects! Click the "Play FF7" button to launch the game.
TIPS:
"Preserve Aspect" turns on/off the widescreen stretching.
Under the "Post-processing shader" menu, Complex Shaders are only used for Radeon Graphics cards.
"Postprocessing", "Max Lights", and "Post-processing shader" work in congruent with each other. Having them all on/off simultaneously is recommended.