Ok I changed my mind again after listening to the new lute sounds some more. It's just ugly compared to the old lute.

In Maestro and ABC Player, the instruments will be called "Lute of Ages" and "Basic Lute". If you open an ABC file or MSX file that uses either of those full names in a part title, then it will use the respective instrument. However, if you open an ABC or MSX file that just uses "Lute" in the title of a part, it'll default to Lute of Ages.

In other words, unless the part name has "Basic Lute" in it, then any Lute part will use Lute of Ages.

Depending on how much time I have, I might be able to make that a configurable option, so you can choose to use the new Basic Lute by default for parts named "Lute".

(Still working on the new version -- I don't have much time on weekdays to work on it.)