You should use do_action and/or apply_filters functions while you’re writing WordPress plugins.
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.