Total Recorder or check your Temporary Internet Files and see if the .flv file for each song is in there after you've listened to them. If the files are there, copy and paste to your desktop, use
Cinema Forge to convert to .avi and then use
VirtualDub to render the audio as .wav. If you want these as .mp3s, use
Audacity to convert.
Total Recorder is retail software. All others are free, legitimate and crapware free applications. The second choice is a bit of work, but it should work.