This from the Important Notes of the Readme File:
Large Fonts
Adagio does not support the Windows Large Fonts setting.
To clarify:
With XP, you may set Large Fonts from the Display Properties | Appearance Tab but not from the Settings Tab.
The Appearance Tab changes the Windows Titles and appearance. The Setttings Tab tries to alter the "application" settings and Adagio does not respond correctly. This may change at some future date.