Air Vehicle Effects Pool v2.0.0
Significant changes to particle placement code which should fix all the problems.
Added additional parameters to help with particle spawn placement.
Reintroduction of Dusty Zones, which cause tarmac and concrete in some areas to act as if they are covered in dust.
Adjustment of particle alpha values to make the effects less intrusive in some situations.
Removal of some redundant data files that were no longer needed.

Air Vehicle Effects Pool v1.7.3
Changes to some internal data and code regarding particle definitions and scaling

Air Vehicle Effects Pool v1.7.2
Removed incorrect #DEFINE which was causing incorrect code to be used when a helicopter got close to the ground

I had been testing some code to improve performance but it wasn't working but I had forgotten to change back to the normal code before building the distribution version.