I know and usually I am able to find a workaround editing the codes but in this case it's a little bit more complicated because you have used less comments in your script as normal. This isn't the first Addon I have bought from you.
I just want to point this out for future customer because the Core-Visustella PlugIns are free and quite popular. And this plugin is one of the more expensive ones. Usually I don't do that because I like tu support others but with this amount of money I really wish for a refund because it's complettly unusable for my project right now. Maybe you could update your Discription because with this price it would be fair to point out the incompactibility that you now know it. :)
Edit: Lucky me....bought it yesterday for full price now it's on sale. :(