The ep-3 Hotelsystem is published under the permissive MIT license and is therefore considered free and open source software.
That means you are allowed to download, install, use and alter the system free of charge for private and commercial purposes.
The license text of the ep-3 Hotelsystem comes bundled with the software source code.
The ep-3 Hotelsystem name and logo are proprietary.
The use of the (original) logo for branding and attribution (as configured by default) is allowed.