Notes about the SHM 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 SHM file type is primarily associated with 'WordPerfect' by Corel Corporation. WordPerfect Corporation sold a DOS-shell program that could be used to switch between running programs.