alexandr - This is mainly just a logistics thing. The link to download the plugins are on our daily builds page and you do not get access to that page until you have a full license. Not a very satisfying answer, but that’s how it is set up right now.
However, the trial is meant for you to see if the core functionality of Corona Enterprise works for you and you are definitely able to do that without the plugin files. If it does work and you want to move on to purchase the actual full license, then we can easily set that up and give you full access.
David