To display your System ID (lmhostid), download and run the Foundry System ID (FSID) utility
To install a FLEXlm licence key, download and run the FLEXlm version of the Foundry Licence Installer (FLI)
To manage floating FLEXlm licences across a network, download the Foundry FLEXlm Tools (FFT) utilities.
If you can't get your licences to work, download and run the Foundry Licence Diagnostics (FLD) utility, then email the log file to support@thefoundry.co.uk.
The Foundry FLEXlm Tools User Guide tells you everything you need to know about licensing Foundry products with FLEXlm.