Seems like LM broke the SP1 SimConnect interface in v4. They hope to fix it in next release.
Anyway because of it Traffic Optimizer (v1914) does not work with P3D v4. Until LM fixes it, here's a new version (v1915) which use SP2 SimConnect and works fine:
http://www.mediafire.com/file/2kd5an6o448qi3d/AirTrafficManagerFSX-P3D_Radar_v1915.zip
Don't forget to install SP2 SimConnect from:
<P3D Install Dir>\\redist\Interface\FSX-SP2-XPACK\retail\lib\SimConnect.msi
Anyway because of it Traffic Optimizer (v1914) does not work with P3D v4. Until LM fixes it, here's a new version (v1915) which use SP2 SimConnect and works fine:
http://www.mediafire.com/file/2kd5an6o448qi3d/AirTrafficManagerFSX-P3D_Radar_v1915.zip
Don't forget to install SP2 SimConnect from:
<P3D Install Dir>\\redist\Interface\FSX-SP2-XPACK\retail\lib\SimConnect.msi