FL, if I load an FXB under Settings/Presets, nothing happens. It just doesn't load the bank. One plugin I can think of offhand that has this issue is OBXD. I have a 64 bit version of that now so It's not an issue ...
FL 12 and kind of found a (rather tedious) way around the plugins not loading. Hwever, some plugins (such as Purity) will only load in the 32 bit version of FL where others such as Sylenth1 will only load in 64 bit. This ...