So everything is lost whenever you close the demo version. How you can turn the demo into a registered version with full functionality is described here . If you want to read it before you start the download, click here . The installation of the instruments is very simple.
Every instrument comes with an installer.
You just have to start the exe-file. During installation you will be asked for your plug-in directory. All files will be installed in this directory and subdirectories. After the next start of your host software it will offer your new instrument within its list of VST instruments. The demo plays the same sound on every MIDI channel and is restricted to some presets.