For users who must access old .DMF (Ulead project) files, the only reliable method is to export to DVD folder/ISO within a VM, then burn using a modern tool like ImgBurn on the host. Ulead DVD MovieFactory is not recommended for daily use on Windows 10 despite partial functionality via compatibility modes. For archival access to old projects, a Windows XP virtual machine is the safest solution. For new DVD authoring, open-source tools like DVDStyler or Corel VideoStudio (the direct commercial successor) provide superior stability and feature sets.