Follow Start > All Programs > DVDVideoSoft > Programs > Free Audio Dub or just click the DVDVideoSoft Free Studio icon on the desktop.
Click the upper Browse... button to select an input audio file from your computer.
Click the other Browse... button. Choose the location where you would like to save your converted audio file. Click Save.
Move the cursor on the time line to find the part you want to delete.
Find the left edge of the part to delete, then click the Trim Left button.
Find the right edge, then click the Trim Right button.
This part will be highlighted by blue color. Then click Delete.
Delete as many parts as you want.
If you delete a part by mistake, just use Undo and Redo buttons.
When you are ready, click the Save button along the bottom of the interface and wait just a few seconds.
Note: Before clicking the Save button you can set to turn off computer after the process is completed. Just go to Options... and make sure the appropriate box is checked.