From what you wrote, I am understanding that you have Premiere Elements 12 (presumed on Windows 7, 8, or 8.1 64 bit) and that, after the choice of Tools Movie/Movie Menu/Next, the program crashes.
Open a new project and go immediately to Tools Menu/Movie Menu and select a theme. First right click the blue ban at the top right corner of the thumbnail of the menu you want. And, then select either Download Now or Download All? Wait for the process to complete. For the purpose of this text, select Download Now so that you download just this one thumbnail for use. Determine if the program still crashes.
That Content with the blue ban needs to be downloaded before use. Are you doing that with the Download Now or Download All?
Let us start here and then we can decide what next.