Your comments

I know this item is 4 years old; however, it no longer appears to function. 

I would suggest that I'm doing something wrong, but I do not get any of my manually entered comments in the SQL scripts. Even with following the above instructions. This is January 9, 2019. 

Has this feature been deprecated? 

My target database is SQLite, but I don't see how that should alter the creation of comments.

I've placed comments on many tables and relationships as a reminder of my thought process. It would be nice if these items appeared in the SQL scripts generated.

Any suggestions as to what might  be an issue with my model?