Forgot to add the datastore option

modules/exploits/windows/browser/ms14_064_ole_code_execution.rb

@@ -84,6 +84,7 @@ class Metasploit4 < Msf::Exploit::Remote
       register_options(
         [
            OptBool.new('TRYUAC', [true, 'Ask victim to start as Administrator', false]),
+           OptBool.new('AllowPowershellPrompt', [true, 'Allow exploit to try Powershell', false])
         ], self.class )
 
   end