The Macro Express Editor window is stuck in full screen mode and I cannot minimize

Macro Express saves the size of the main window when you exit the program so that it can restore it to the same size that it was before you exited. What has likely happened is that you maximized the program and then exited. Upon re-running the program, the default size is now the maximized size. So clicking on the “maximize/restore” button appears to have no effect.

When that button shows in the non-maximized mode, click on the title bar, hold the left mouse button down and drag the window down and to the left a little. You can now see the edges of the window. Drag the edges to resize the window. Once resized, the “maximize/restore” button will work as you expected.