Notes about the HM3 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 HM3 file type is primarily associated with 'Help & Manual' by EC Software GmbH. Help & Manual is a single-source help authoring and content management system for both single and multi-author editing. Working with Help & Manual is as easy as writing text with a word processor, while all content is saved as pure XML in the background.