Web sources

Hi everybody, i have discovered this wonderful program some months ago and i have decided to make it better. I have downloaded the web sources for lyrics, i have copied them in the right folder (appdata/mp3tag/data/sources/) but i am not able to make them work, i don't know even the button to use them once i have started mp3tag...
Can somebody help me?

If copied to the right folder they appear in the menu "Tag Sources" or at this :mt_freedb: button.
See Web sources framework