You're looking for information on the Logitech MK ESPN mouse software link. Here are the details:

The official download portal for all MKESPN mouse and keyboard drivers is hosted on the manufacturer's website. MKESPN Official Driver Download

(Note: this domain may redirect to a generic peripheral driver hub like DriverHub or OEMDrivers.net ).

Use the "M" icon or the macro section to create groups and record custom key sequences.

To help you get the exact version you need, could you tell me: What is the of your mouse (e.g., X15, G5)?