24.07.2020, 20:48
Hybrid can already handle 64bit Avisynth, you just don't know how to tell Hybrid to use 64bit Avisynth. 
I'm currently not adding it to official releases since:
a. it would add an additional 200+MB to Hybrid
b. some filters are not supported
c. more stuff to maintain
d. I'm uncertain whether 64bit Avisynth will replace 32bit Avisynth and some filters get lost or if there really will be an option to switch between 32bit and 64bit Avisynth.
Cu Selur
I'm currently not adding it to official releases since:
a. it would add an additional 200+MB to Hybrid
b. some filters are not supported
c. more stuff to maintain
d. I'm uncertain whether 64bit Avisynth will replace 32bit Avisynth and some filters get lost or if there really will be an option to switch between 32bit and 64bit Avisynth.
Cu Selur