i have had a lot of promblems with this VST . . .
i’m operating in Win XP x86
all that you have to do to fix MASSIVE’s crash is to delete NIMassiveDataBase_ul .
it’s located in C:\Documents and Settings\Local Settings\Application Data\Native Instruments\Massive
and i guess some folders are hidden , so you have to chose the option “show hidden files and folders”
hope this helped.