Logitech releases 25,600 DPI software update for several HERO gaming mice | TechSpot
Don't. Just don't. G502 HERO firmware update through G HUB is broken. Waited for over 1.5h with the mouse "updating" and not working, and at the end had to disconnect and reconnect
Logitech G502 Hero Software, Drivers, Firmware, Download for Win, Mac
Logitech G502 HERO Driver and Software Download
How to update your mouse firmware (logitech G502) - YouTube