Cannot be converted

I downloaded the Aerofly FS 4 Aircraft SDK because I wanted to build a Japan Airlines paint scheme for my Boeing 737-900ER. Then I thought I would convert the files according to the instructions on the home page and in the Read Me. But here is the bug, for some reason, when I open the converter, a white screen tab opens and the tab disappears without starting. Can someone please help me how to deal with this? I look forward to your reply.