Ah okay, good to know. So it is just a matter of time when the compiler is going to support it or is it definitely that there will be no 64-bit FlashFXP until you use a different compiler - sorry still curious.
Personally I don't think that there will be a lot of difference in performance between 64 and 32 bit FlashFXP but maybe I'm wrong. I'm not really an expert.
Anyway thanks for your answer!