If a window of an application is too large and auperior to the screen, then the problem can be solved as follows:

 

If the upper edge of the window is visible, then you can maximize the window to the screen size with a double click. Then you can use the corners to reduce the window to the desired size.

 

If the top of the window, or the whole window is not visible, then the window settings for the program must be cleared. The problem can be solved as follows:

 

 

The folders of the program always start with "en.pps4me.<program name>.savedState" e.g. "en.pps4me.AcanaQRCodeGenerator.savedState".