I am using Adobe DNG Converter 6.3. My Computer runs Windows 7 x64 SP2, all updates installed.
My screen resolution is native 1920*1080 on an 18" notebook screen. Text appears very small and is hard to read, so i adjusted the dpi settings to 125%. Using these settings Adobe DNG Converter is not usable since the window is not resizable, this is definetly a bug (See screenshot, showing the main window, though DNG Converter is in German).
I do not know where to file bug reports for the DNG Converter so i post this here.