you will probably get way more support from truesky contact@simul.co
they also have a forum thread: https://forums.unrealengine.com/community/community-content-tools-and-tutorials/15332-released-truesky-alpha-for-ue4-complete-sky-and-weather-system?33944-RELEASED-trueSKY-Alpha-for-UE4-Complete-Sky-and-Weather-System/=