Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey.All hotkeys can be changed on the trainer.

Trainer Options:

NumPad1: Infinite Health
NumPad2: Infinite Power
NumPad3: One Hit Kills
NumPad4: Change Amber By 500
NumPad5: Change EXP By 500
NumPad6: Super Speed

Editor Options:
Misc: Amber
Misc: EXP

Notes:

EXP / Amber: Press ESC ingame so your EXP amount is shown, press hotkey. Close menu and open it again to see it has changed.