The hpr file extension is used by RoboHelp software to save user preferences. Files with hpr extensions are configuration files from Adobe RoboHelp. They are used to keep track of settings for outputs.
These files are considered Settings Files. The hpr file format was developed by Adobe Systems Incorporated. They are supported by Windows and Mac operating systems.
You may never see hpr files as they are used internally by RoboHelp. They are not intended to be opened manually. They are usually named after your RoboHelp project.
Hpr files can be opened with Adobe RoboHelp software. If you double-click an hpr file to open it and Windows does not recognize the extension, you will get a message to select an app to open the file.