If you do this someone else can write plugins to your plugins, can do modifications without touch to your plugin’s core code. So users can do plugin upgrades automatically.
I was away for 6 months because of compulsory military service. I came back to home about two weeks ago. I couldn’t look this blog until now.
Firstly i’ll read/answer your accumulated comments. After that I’ll make a development plan for WP Favorite Posts according your comments. I hope the next version of plugin will be published soon.