If you're receiving errors when trying to extract files downloaded from Esenthel Store, most likely it means that the download got interrupted, and only part of the file has finished downloading.

In order to solve this issue, it's recommended to download files using Esenthel 2.0 Editor, which has the "Store" functionality built-in, from the "M" menu on the bottom of the screen.
From there you can log in to your account, and download your purchases.

Esenthel 2.0 Editor supports resuming interrupted downloads.