Notes about the EIG 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 EIG file type is primarily associated with 'Easy Index Generator' by Easy HTools Corporation. Easy Index Generator provides for creation of configurable index files (files of Contents) for any file types, which can be used in CHM (HTML Help), eBooks, online Help, as Data CD menu, as a Site Map of your Website, etc. making it possible to have quick access to everything..