Have you got the start in directly filled in to point to where the binary is? https://prnt.sc/ewhhma Also if you are using bodyslide https://prntscr.com/ewifbu make sure you hold ctrl when building every time otherwise it will write to the fallout game folders instead of the MO virtual folders, with ctrl held files will be written to the overwrite of mod organizer. you can set it up to write to a folder after the first time https://prntscr.com/ewify9