Well I figured out how to disable the profile switch button.
I made a blank disable key map
Close ICUE completely
went into where the profiles are saved C:\Users\%username%\AppData\Roaming\Corsair\CUE5\profiles
Opened the profiles with notepad++
There maybe multiple profiles in this directory. you should select the one that was modified most recently as that should be the one you just added the new keymap to.
Search for name of Key assignment mine was Disable 3
What I highlighted was blank add the value <key>MouseProfileSwitch</key> save it and reopen ICUE and it should set the key to disabled.
you can verify it on the dashboard
Rebinding Profile Switch for Corsair Scimitar Pro no Longer works On V5. I have a Corsair Scimitar RGB Elite, and with the latest version of ICUE I can no longer disable to the profile switch button. This worked fine on V4.