Different price for Master Study LMS Pro plugin

Recently we bought Masterstudy Education WordPress Theme from Envato market with 1 year support for 90$ but here https://stylemixthemes.com/ the same Masterstudy Education WordPress Theme is selling only for 39$? Is there any differences between these two themes? If no would you please refund because we think it’s not fair to overpay.


$39 which they are selling is a MasterStudy LMS Plugin.
MasterStudy LMS Plugin is a cornerstone part of the Masterstudy WordPress theme for the education business.

And your purchased one is a Education WordPress Theme - Masterstudy ($69).


EDIT: As above