To Uninstall MP3 Decoder 1.2, delete all the files in this directory 
   (X:\???\MP3 Decoder\*.*)

Delete installed fonts
   (C:\Windows\Fonts\tahoma.ttf)
   (C:\Windows\Fonts\tahomabd.ttf)

Delete Registry Key
   (HKEY_CURRENT_USER\Software\HPL Software\MP3 Decoder)

Delete Start Menu links