Reply To: 3.1 Portable Ninja wont open on Win10 Home › Forums › System Ninja Support › 3.1 Portable Ninja wont open on Win10 › Reply To: 3.1 Portable Ninja wont open on Win10 August 5, 2015 at 12:07 pm #11011 Shane GowlandKeymaster System Ninja now requires .NET Framework 4.0