Contact(ENG,GER): unrealmarketplace@virtualbird.de
Plugin is located, after the installation via the launcher, in the directory: Engine\Plugins\Marketplace
If you use the UE4 GIT version you have to copy the plugin into your project: D:\myproject\Plugins\RealTimeImport
If you are satisfied with the plugin and don't want any updates you can also copy the plugin into your project.
Activate the plugin in the editor.
This video shows how to create an event: