I have build the engine from source and when i want to access the Marketplace it downloads the Launcher and that forces me to download the Engine again.
1.Do i need to download it or can i somehow tell it that i already have it build from source?
2. If i need to download it will the assets work only with the downloaded one or with my source one too?
maybe a duplicate of that one: https://answers.unrealengine.com/questions/14147/howto-use-a-custom-engine-build-with-the-launcher.html
yes, it is the same problem.
I found a workaround to be able to download from Marketplace. Just cancel the engine download each time you start the launcher and then just start downloading what you want from the Market. The projects will be saved in C:\Users\Documents\Unreal Projects and you can just open them from the editor 