I think the developer hasn't uploaded his latest version yet. The new version has a very powerful element called Data table which has not been developed by anyone else ever.
Can you zip your plugin and send me to see that update notice? i have installed 2.5.2 but i don't see any update noticeHi Apanha!
From the WordPress Updates page, I got its notification.
If you are able to install it and activate it, you can then update it, compress and download it.
I already saw this from codecanyon many times, I suppose that this is the reason you released v2.5.3, but the files where still 2.5.2.