The FSLabs A320 is by no means a regular package, for a start it is one of the few aircraft that really make you go WOW! There are some considerations to respect.
Remember to disable the package in the add-ons menu and exit the sim before using other aircraft.
Remember that you can't use any special IFPro startup functionality: Startup Behaviour = "None" for this aircraft.
If you've not added the A320 to the IF hangar (manually required with bug fix) then wait for Preview 03 available very shortly. There are path errors in the A320 installer that IFPro fixes in the IFPro configuration and aircraft Index for reliable operation with IFPro.