This is the main window of Direct MP3 Splitter Joiner where you are supposed to select the tool you want to use. 

You can use Direct WAV MP3 Splitter by choosing an audio file and specifying the split points you need to use. 

The Settings window of Direct WAV MP3 Splitter enables you to activate auto track numbering and playing sound after splitting. 

Direct MP3 Joiner will allow you to create a list with several files that you want to combine into a single MP3 track. 

The Options window of Direct MP3 Joiner is the place where you can configure the actions that will be taken before, during and after joining.