The application should be able to save the recorded files as .wav, .wma, .ogg, or .mp3. If it is not working properly anymore, just uninstall it and then install it again. Also, before beginning the installation process, try running a registry cleaner to make sure that there are no leftover registry keys in your system. Also, you can convert the files directly to .mp3 using a .wav to .mp3 converter from Software Informer database.