At this point I don't think anyone has the slightest clew to when 4.09 will come.
Someone released a utility to extract files from the SFS security archives that hold all the game's 3D, Damage and Flightmodel data
An incredable stupid thing to do IMHO. This 'utility' is simply far too dangerous to be handed out. It could kill IL-2 online play, which none of us want to happen.
Oleg has stated 4.09 will deal with this and because it has to be adapted now, 4.09 has been delayed. I would not expect it before the end of this year.
The only positive point is that this 'utility' seems to be in very low demand, so not many players are 'cheating' online. A great indication this community's members are more interested in increasing their flying and dogfighting skills than in flying an undestructable TB3 at mach 6.