The video which i've been attached displays my problem.
When I start the music maker a window opens says download songs or close, at that time the interface shows me all menus such as - info, file manager, synthesizer, etc, etc...
But when i closes that window the menu automatically disappers & only 2 menu items are displayed.
First of all, thank you very much for the video. It made it far easier to diagnose your problem than leaving us guessing, which is what most people do.
Your problem is simple. When the program opens and shows you the dialog box, it is in "Expert Mode". (See the blue box under the MAGIX logo at the top left of the screen.) Once the dialog box closes, it switches to "Easy Mode". You simply need to switch it back to Expert Mode and all of the tabs will reappear.