Notes about the XCM 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 XCM file type is primarily associated with 'CmapTools' by IHMC. IHMC = Institute for the Interdisciplinary Study of Human & Machine Cognition. Concept maps represent organized knowledge, graphically and textually captured and displayed in CmapTools.