First off, I want to give you guys two huge thumbs up! You've done an amazing job with the plugin! Kudos!
I plan to make a fair amount of additions/modifications to the plugin to better suit my clients needs. I was wondering if there is any licensing restrictions that prevent me from hard-coding the modified plugin into their website? I'm going to be getting paid for the project so I just want to make sure I'm not stepping on any toes.
I will definitely keep all original plugin author info in tact. I appreciate your feeback.