HOW TO MODIFY DISPLAYING TIME OF LWYW WINDOW ON THE SCREEN:
1 - Turn the toolbar on by clicking left mouse button in the open "Learn While You Work" window:

2 - The toolbar will be displayed as following:

3 - Select "Options..." in the pop-up menu:

4 - Select the desired Show duration and Quiet duration in Time option:

In which:
5 - Click on "OK" button when you are finished.