In the latest version of alpha 2.1.2 (under Windows 10) Normalize effect increase level to 0 (zero) even if I set it to -2.5
Do any numbers work? If you set the goal to -6, so you still get 0?
Sory for the false alarm. I realised that I magnified the waveform by mistake. I reduced the level of the wave to default values and I could see that normalize effect works well.