As download you can get here the actual Mainpanel texture (state 6th June 2018), which must be adapted to the aircraft realworld registration code.
This is also needed for the old repaints which are still used externally. Those also had a costum mainpanel texture containing the aicrafts registration,
which became obselete now, due reshading of the cockpit model.
In case you miss to add that texture, there is one fallbacktexture which goes into p