Reversing Fn key - Logitech Keyboard K290

Solution 1:

For anyone else that stumbles upon this question. SetPoint now includes a checkbox that enables you to change the default setting back to using F1-F12 instead of media keys:

enter image description here

Solution 2:

For all the people still wondering how to do this on Linux, here is the link to the solution:

https://github.com/milgner/k290-fnkeyctl