The NL2000 team is constantly working on improvements of their Freeware scenery and has released version 4.08 for a number of airports in FSX & Prepar3D.
The Team has also updated the NL2000 library, separate packages for AI traffic in FSX and P3D. To install correctly, you need the new installer version 4.0.74. A new manual is available. Although the 4.08 items are tested, the team invites users to report possible bugs via the forum..
The NL2000 version 4.08 Homepage is your source for further details and download.