I am having the same problem, FOMM starts, but then freezes when I try to use package manager. I have tried both logging in and clicking cancel. I have uninstalled everything, reinstalled, tried different folders. FOMM broke the moment I upload Project Brazil. And I have deleted Project Brazil from my mod directory and FOMM still does not work. Edit: I deleted Project Brazil from my mods folder. Did a complete uninstall and re-install. Things seem to be working now, though I have to click cancel to use package manager. Logging in makes it crash.