Notes about the HEU file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The HEU file type is primarily associated with 'Adobe FlashPlayer' by Adobe Systems Inc. HEU file is an Adobe Flash Player Cache Metadata. It is somewhat associated with .SWZ files. These two type file HEU and SWZ are in a sub directory of Adobe FlashPlayer in your main user Document and setting folders under the Application Data folders.