Omnis Studio is object-oriented, has a completely new and very productive Method Editor, a new and integrated design environment, full support of the latest operating systems and, most important, it includes the Omnis JavaScript Client technology for the efficient development of web and mobile apps including standalone mobile solutions. All the improvements in Omnis Studio mean more attractive and user-friendly UIs, a shorter learning curve, faster and more productive development, multiple deployment options, and easier maintenance: these all add up to lower costs and a shorter time to market.Yes you can but the fewer conversion processes an application has been through the more successfully it will convert to Omnis Studio. For very old Omnis applications, such as those created with Omnis 3, Omnis 5, or even Omnis 7 version 1 or 2, it might be worth converting a library containing your file formats only (called file classes in Studio), then in Omnis 7.3 creating basic windows and reports based on those file formats (file classes), and then converting the new library to Omnis Studio, or alternatively doing all the GUI design work in Omnis Studio.