You need to go create a vst-instrument, then press F3 to open the mixer. then you look to the far left on the mixer, theres a midi-button, press it to hide midi-tracks and only view audio tracks (outputs from vst's) then select the track you want to add an effect on and press on the small "e" button, a new window opens and you have 8 inserts that you can use effects on. hope you understand. there are also other ways to do this, but then you will have to look in the manual