I've tried to assign NumPad 2 to my remote as an example using flirc_util.exe record_api 0 90
It learns the keypress from the remote, but when the key is pressed on the remote nothing is happening when testing in Calculator, Notepad etc:
C:\Program Files (x86)\Flirc>flirc_util.exe settings
flirc_util version 3.20.0 [3.20.0]
Firmware Detected
Version: v4.4.2
SKU: Flirc 2.0 [dori]
Hash: 0xD60074C5