steps
what you'll need: Fiilex Manager V2.4 desktop app via USB-A to USB-C cable
1Download Fiilex Manager V2.4 for Windows or Mac from fiilex.com/support/firmwareUpdates.php
2Install: Windows double-click installer; Mac drag to Applications and bypass Gatekeeper
3Connect K40 Color to PC/Mac with USB-A to USB-C cable
4Launch Fiilex Manager, auto-detects and loads latest firmware
5Click Update; do not unplug during update
6Power-cycle fixture after completion
7Verify at fixture: Setting > Info
GotchaUSB-A to USB-C cable only GotchaFirmware below V2.5: email fiilex@fiilex.com before updating GotchaMac: Gatekeeper bypass required via Security & Privacy