You can use any current AppWorks environment e.g. on Skytap or Azure. For the demo scenarios it doesn’t matter if you use the Windows or Linux environments.
You should make sure that nobody is working with the same user in the same environment and tenant, doing the same tutorial.
Start the system and login to the Explorer. The Explorer can be found using following URL structure: http://<machine-name>.<tld>:<port>/home/system. E.g.: http://processsuite-1.com:17070/home/system.
The Explorer is the development view of AppWorks.