I was a beta tester for Traffic X, my name (incorrectly spelled too) is in the manual. I reverted back to Traffic (was Traffic 2005) so that should tell a story. Anyway, open Traffic X controller, you will need to look around in each function as I uninstalled mine. Look for and set all planes and helicopters so they are ticked, set traffic to 200% with the slider. Then create the traffic plan/movements so it sets a new TrafficX.bgl and save it,that should sort your Traffic problems. Wait while it tells you it is finished, it takes a bit of time to complete.
Just like Traffic, Traffic X and probably Traffic 360 (I refused to purchase it after Traffic X) since in my view they are only copied from each other and a few embellishments added, I have problems with GSX. The problem being the stupid helipad codes that were added. I got mine working yesterday perfectly and today the problem is back. Anyway, yours and my problem do not reflect on FSD or indeed GSX. Just that unlike Traffic, Traffic X often starts with no planes. JF are a brilliant company but just very lax at Traffic programs after the original Traffic (was Traffic 2005). I could use Traffic X and get rid of my problem but it's just a PITA to use with silly stuff like planes in buildings, in fuel pumps, planes copied inc all numbering. JF were informed of the problem during testing but they are still evident, I believe the same happened in Traffic 360.