I tried to upgrade to the latest version and all wnet well until I tried to make changes in the Back End Configuration. It would break the Component evry time I tried to save. The page would just go blank. I finally ended up going back to the earlier version and it works fine. I lost all of my requests and subscribers in the process.
I tried to get help with no avail. I posted in the forums and emailed the author woth no reply.
But, with all of that, it's a great tool and want to give Kudos to the developers. After all it is a free component.