To fully clean up server from ID-based FLS the following steps should be taken: 

1. Check services to be uninstalled and stop them. There are several service names that could appear: 
   1. FNLS_material - default service name that is used during installation via command prompt
   2. FlexNet Embedded Local License Server​ - default service name that is used during installation by using FlexnetLicenseServerWizardInstaller.exe
      Please keep in mind that this service name could be changed during installation by User. 
      Example: 
      
2. Removing service location
   For each of the found service find service location
   1. Check service location 
   2. Remove service location
      Example of how to check service location: 
      
      
3. Removing service from registry: 
   1. Copy service name from service properties
      Example: 
      
   2. Open Command prompt as an Admin
      Example: 
      
   3. Execute command: sc delete <<Service name>>
      Example: 
      
4. Removing trusted storage location
   1. Execute command: rmdir /s C:\Windows\ServiceProfiles\NetworkService\flexnetls\material
      Example:
      
      
   2. Confirm folder removal

Additional istruction from Revenera could be found by following guides for Windows and Linux. (producer_name mentioned in guides is "material”)