[Client] Unable to Restore to Default Key Bindings

We share PCs at our workplace and sometimes people change the keybindings. Usually we can restore it by default, but one person managed to make changes that could not be restored. How he did it was:

1. Edit the input.ini file in Riot Games\League of Legends\Config
2. Added two lines of code

evtPlayerAttackMoveClick=[Button 1]
evtPlayerSelectClick = [Button 3]

3. This binds left-click to Attack Move and Mouse wheel button to the select.

We were able to restore the keybindings eventually by deleting the input.ini and PersistedSetting.json file, but it took us a while to figure it out.