I just added this new feature:

1. The lyric

</p>

The lyric is not available, lets enter one

2. Click the edit button

</p>

You can now edit the text above the buttons

3. Enter the lyric

</p>

If you are done editing the text click save

You can undo it at any time by pressing “cancel”

4. Save the lyric

</p>

The lyric will be stored in the previous file, if that is not writable, in the default location

Or as video (slightly outdated) http://random.sarine.nl/gmpc-lyric-edit.ogv