Hifisimtech have updated their Active Sky for Prepar3D V4 to work with P3D 4.2. All you need to do is go to their website and download latest version (build 6616) which is an open beta.
As this is an update it is used at your own risk and is meant to be tested before the general release. It can and usually does contain come bugs and similar issues so this is important to take into consideration.
For more info head over to Hifisimtech’s website.