In case you can't locate the Abvent/BIM Track menu in the Archicad menu bar, you can correct your installation in a few steps:
Launch your Add-On manager in Archicad through the menu Options/Add-On manager.
The Abvent BimTrack Add-On should display in this list. If not, open the section "Edit list of available add-ons".
Click the "Add" button to load the Abvent BimTrack add-on (BIMTrack_A2x.apx).
You will find it in the Archicad 2x / Extensions folder.
Select the add-on and click OK to load it.