Sypheria

Im trying to change it to either 64 bit or 32 bit because i have the right click problem to get into the reaction wheel menu thing, its not working with my B9 Aerospace pack so i think i need to change the version of KSP to 32/64 bit, can someone tell me how??

Im trying to change steam KSP to 32 bit because i think that it is in 64 bit automatically since my right click problem to get into the reaction wheel menu doesnt work on mods(B9 Aerospace). So i want to change it to 32 bit, but i dont know how, someone help?