SuperMemo Mobile by default starts with English interface. It is possible to switch it to Polish. If you want to switch back to English you can do it selecting 'Opcje...' from Menu and selecting 'English' in the droplist labeled as 'Jezyk interfejsu'.

The whole process should proceed as follows:

1. Install the Advanced English from the 'Extreme English!' DVD-ROM.
2. Upgrade to SuperMemo 2002 - Open the installed AE collection in SuperMemo 2002.
   The program will ask for permission to make a conversion.
3. Choose the 'Recover' option - make recover using the 'check all' option.
   Repeat this step until 'No errors' appear at the end of the recover report
4. Import the learning process from AE'97 to AE DVD.
   The import procedure has been described above.
5. Repeat the recover using the 'check all' option.

The 'recover' option will return several non-important errors.
After this operation you will lose about 60 elements. These elements contain help about using SuperMemo and are not included in the newest Advanced English collection.

To move the learning process from the old AE to the new one use this procedure:

1. Make a backup of the SM8 collection and close the program.
2. Launch the new SuperMemo Advanced English.
3. Open the backup that was made before in the new SuperMemo (Ctrl+O).
4. A conversion process is started.
5. After the conversion is completed select File: Export: learning process. In this way you receive a file with your learning process.
6. Open the new Advanced English collection and choose the option: File: Import: Learning process.
   This will import your learning process to the new AE. Several questions will appear. Please answer as follows:
   • Do you want to integrate all files with the file system? - No
   • Warning! This collection is already using secondary storage! Continue? - Yes
   • Warning! System and backup source differ. Continue? - Yes
   • Cannot find user profile. Continue without importing user profile? - Yes
   • Import history of repetitions? - Yes
7. Now make the 'recover' of the entire collection (Ctrl+F12). If there occur any errors please repeat the recover.

Probably the media path has been changed. Launch Supermemo and open the option-panel (Ctrl+P). In the 'Secondary storage' section on the 'Data access' panel type the correct path to your DVD drive where the DVD-ROM is placed.
If it doesn't help, you will have to reinstall Windows Media Player 6.4. The installation program is placed on the DVD-ROM in the WMP6.4 directory. It will reset the default drivers and audio codecs settings.

In the 'Start' menu select 'Control panel', then 'Sounds and multimedia'. On the 'Hardware' panel double-click 'Audio codecs' and choose the 'Properties' panel. A list of available codecs will appear.
Two mp3 codecs should be there at least: Frauhoffer and Creative (ctmp3.acm). Double-click the ctmp3.acm and change the priority to the highest available. After accepting, the ctmp3.acm codec should appear at the bottom of the codecs list. The sounds should be played correctly now.