The newest version which is compatible with P3d 3.4 Hotfix 2 is available for download. The Traffic Limiter is described as follows:
28. A Traffic Limiter option is now provided. This is enabled by parameters in the INI file, or more easily, by setting the desired limit in the edit box for this on the lower right corner of the Miscellaneous options tab. Traffic is limited by removing AI aircraft, from whatever source, as they are added, once the limit is reached. The aircraft being deleted is not necessarily the last one added. It will usually be the furthest one -- Traffic is only spawned within the “reality bubble” (about 80 nm radius) so that’s as far as it might get. The behaviour is modified by parameters in the INI file. There will be a new section, probably added at the end of the file, containing, by default:
[Traffic Limiter]TrafficLimit=0GroundPreference=50AirportPreference=50NearerPreference=50The limit set to 0 switches the facility off.
See the FSUIPC installer ReadMe file for more details.