Here are the files you asked for. I haven't messed with them prior to zipping here.
However, I did mess around with the formatting and it appears that the problem with the blurriness has to do with how the outline colour is implemented. By default the outline and text are both black, and the outline is quite blurred. I've attached another screenshot showing this with the red outline. Making the outline white seems to make the text non-blurry, though it's not perfect (no outline would probably be ideal, but that doesn't seem to be an option). From other formatting tests, checking the "bold" checkbox doesn't seem to do anything.
Also still has the huge size for the popup window regardless of which options in the formatting I set to be displayed (I tried disabling all options except song name and the popup is still the same size).
Anyway, it definitely seems like the outline issue was the cause of the blurriness I was seeing, so hopefully this is good feedback to improve the next version. Really enjoy your application overall