VOX PROTECT is recommended for an installation with 32GB of ram. Below that, you may not have enough resources to remove these digital clicks.
You should set the buffer to at least 1024 samples.
For example:
-On Protools, go to the Setup/Playback Engine/HW Buffer Size folder.
-On Audition, go to the Preferences/Audio Material/HW Buffer Size folder.
If you use the insert plug-in, the number of insert tracks is limited on the different Editors/Hosts. You can see the technical recommendations for the number of tracks per editor in the SPECS tab.