Convert topics in CHM file to Microsoft Word Documents with CHM2Word is very simple. Normally you only need three steps:
File -> Open...
Press Ctrl + O
In the Windows Explorer, left click a CHM file with your mouse and drag it to left pane in CHM2Word, then release left button of your mouse.
Then in the File Open dialog (shown in Figure 1), select a CHM file and click Open button. All the topics in the CHM file will be added to the Content Tree (see Figure 2).
Figure 1: Find a CHM file to open
Figure 2: All the topics in the CHM file have been added to the Content Tree
File -> Start Convert
Press F6