To legally download version 15

Once you have the official installer, follow these steps:

Always obtain DevExpress software directly from the official DevExpress website or your client account.

While this article focuses on downloading the legacy version, you should consider planning an upgrade. The gap between 15.2 and current versions is significant:

: If you receive "License not found" at runtime, ensure the DevExpress.Data.v15.2.dll version matches the control version, and that the licenses.licx file in your project contains the correct entry.