I'm sorry I didn't read the whole thread and I know this is late. Why not provide two versions of Delicious Library Inf? One costs $20. It only works/installs

I'm sorry I didn't read the whole thread and I know this is late. Why not provide two versions of Delicious Library Inf? One costs $20. It only works/installs correctly if you have the original app. The other one costs $40. It is a standalone app. Make a minor bugfix update that says "hey" to the users of Delicious Library 2, and link to the expansion. Sell both.