Files with qpk file extension might be found as installable packages from Qt Extended platform.
QPK file extension - Qt Extended installable package
What is qpk file? How to open qpk files?
File type specification:
The qpk file extension is mainly related to Qt Extended and used for its installable package format. Each qpk file consists of program files organized in a specific directory structure that has been compressed.
As of 2009 Qt Extended is discontinued.
This qpk file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.