Well not much info there either. So if I understand correctly it can receive CC and PC commands but it does not mention which MIDI channel to use and if it can receive MIDI from other apps.
FX2 needs to be able to either receive MIDI from a virtual MIDI send port defined by another app (Stage Traxx) or define a virtual MIDI receive port other apps can use to send commands to. Stage Traxx supports both. It will send MIDI to all ports it detects whether they are hardware ports or virutal ports and it can also define a virtual send port. So it really depends on whether FX2 can receive MIDI from other apps.