Little Problem,
we have Buy Roads at the Marketplace and in the Editor is the Texture vanished.
We make Drag an drop the uasset Files from the Project Folder into the Content Area from the Editor but is coming a Fail Message.
How can we do to Import the uasset Files?
You can’t import uasset files through the editor, open your content folder in explorer and not through the engine itself and put the uasset files there, they should show up in the project once you do that.
It is not works the Texture uasset files is not showing. 
If you got it to show in UE but the material doesn’t show the texture then you didn’t import them in the correct folders “fix up redirectors in folder” should fix this problem.
If you didn’t understand my original comment you have to manually move the actual uasset file inside your new project without using the engine import/drag and drop.
If the pack you’re using has a content folder that makes things even easier, you just copy everything from there and paste it inside your own content folder.
