I am experiencing the same problem as many of you - upgrading from version 3.13 to 3d Version 4.03. 3D appears in the menu before you click the start button. After you click start and the program is running, there is no 3D option. I contacted tech support several days ago. The initial response I received was that he did not understand the problem and needed more nformation. I then sent 2 screenshots and a follow up email. To date I have not received a response. Reading through the forum messages, it looks like someone from AirNavSystems said the tech has been off for 3 days and will be gone for an additional 4 days. So, they have our money and we have a product that is not working as designed until resolved. I am confident that it will get resolved, but it will be on AirNavSystems schedule.