Clean registered users list

Clean the registered users listed as using a license. The command option to clear users for all licenses is also shown.

Warning: Use flmprg -i with caution, as it implicitly invalidates all existing sessions of a specific license; eventually all running applications will stop with a license error.

It may be used in the case of, for example, a DVM crash when the associated license would not be recovered otherwise. In other cases, the -u option to force a check of the registered users should be preferred to the -i option.

Start the command line interface.
1. Open a command prompt.
  - On Windows®, open the License Manager Workplace window from the Start menu.
  - On Linux®, open a command prompt. "sudo" may be required.
2. Type flmprg -i <license_number>
  
  All users registered for this license are disconnected when you use this option.
To clean all licenses, execute the command:
```
flmprg -i all 
```