HOW TO SELECT A TOPIC TO LEARN IN LWYW:
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 - Click on "Select Categories..." option in the pop up menu:

4 - Categories dialog will be displayed as following:

5 - Click on the check marks in front of desired categories to activate desired topics.

In which: