So speaking as the leader of the 64bit project. Would this make 64bit kinda harder to install with the fact that steam will delete 64bit if the normal tML update? Which would also mean that everyone using it currently would most than likely be forced to either wait for a 64bit update or reinstall their terraria completely to play 32bit tML.This version is not 64 bit. I believe there are plans to make the official tmodloader version 64 bit after it's ported to 1.4, but I can't 100% confirm this - you would need to ask their devs. In the meantime you can always install the 64 bit version over the 32 bit one, like you will be able to for any other non tmod mods.