In 1.08 bass clef was added as well as two new instruments. The piano and cello both support bass notes. Bass clef is available for all modes. In order to accommodate bass notes the naming convention I had used for a single scale had to be changed. This resulted in much of the underlying code being changed as well.
1.09 saw a few minor bug fixes that resulted form these changes as well as things like forgetting to update the version on the title page.