On-premise means a local license that is tied to the computer hardware. An on-premise license cannot be used in a VM.
A Cloud license is not tied to the hardware of a computer. It can run on any computer or VM; however, it needs to be authenticated with Sinolta Cloud licensing server over the internet.
Enterprise licensing allows corporations to set up a redundant Licensing server within their corporate network and have multiple Sinolta projects run on various computers or VMs within their corporate network. The enterprise licensing servers authenticate and control the number of Sinolta projects that can run within the corporate network.

Contact www.mrcsi.com and ask for an upgraded License. A new Licence file will be sent to you. The Registration Wizard will be able to take this new file and upgrade your license.

To run a Trial license, your computer must be connected to the internet. Please ensure that your computer is connected to the internet and firewalls are not blocking any traffic on port 80 and 443.

That is one way of doing it. Alternatively, you can purchase an enterprise license with a pool of points. You can have an unlimited number of servers that can authenticate with your enterprise licensing server and run as long as the total number of configured points in your system does not exceed the Enterprise point count.

There is no limit on the number of simultaneous users who can connect to the Sinolta project.
Every user uses a finite amount of CPU on the server-side while they are logged in. It is the responsibility of the system integrators to ensure the project server has an adequate number of cores to handle the required number of users or limit access via the Sinolta security model.

Unlimited.

The standard Licensing option does not allow system Integrators to offer Data services to their customers.
MR Control Systems offer a much better licensing option to the Data providers