Notes about the CYL 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 CYL file type is primarily associated with 'Ribbons'. Molecular graphics software. Use ms-cyl command in Ribbons to convert .DOT to .CYL.