1. Run MP3Producer
Click the Start button in the Startup menu and choose Programs > MP3Producer. The MP3Producer main window will be displayed.
2. Set MP3 to WAV mode
Use Main Menu: Mode or click on mode icon in Info Bar. In the right corner of Info Bar appears the following mode icon: 
3. Add MP3 files
Add MP3 files which you want to decode into Track List. Use Directory Tree or press button "Open" in Main Bar.
4. Select an output directory
Select directory where encoded WAV files will be saved. Press button "Output" in Main Bar or use Main Menu: Action > Select Output Directory... This directory is shown in Info Bar.
5. Enter files info
Fill out Artist, Album, Year, Genre and other fields on "ID3 Tag" tab page. Song title can be edited in column "Title" in Track List.
If you have got Internet connection you are able to use function "Get CD info from FreeDB" (press button "FreeDB" in Main Bar or use Main Menu: Action > Get CD Info from FreeDB...).
6. Specify filenames format
Use "Filename" tab page to specify the WAV filenames format, the type and format of playlist.
7. Select WAV Settings
Choose the needful WAV setting (22050 Hz Mono/22050 Hz Stereo/44100 Hz Mono/44100 Hz Stereo (recommended) on "WAV Settings" tab page.
Hint: Specify the settings concerning the course of the copying and encoding processes. Press "Settings" button in Main Bar.
8. Press the Start button
Now you can run encoding process. Press the button "Start" in Main Bar. You can see information about encoding process in column "Status" of Track list.