I've noticed people having trouble getting Faderport to work after Copperlan installation.
Here is how I solved the issue:
In Copperlan Manager select the PreSonus FP2 port, select MIDI virtual cable, add a MIDI cable to VMidi 4.
In StudioOne External Devices select FaderPort (2018) and change the Send To and Receive From to VMidi 4.
Not sure if any functionality is lost using this method but it seems to work normally.