Hi
You should go via your reseller to have the copy of the LIC file.
But if your system is still running, you can just change disk and make a backup.
the LIC file is loaded from the disk just to warn the system what is allow and what is not. This is done one time and after you can erase the LIC file from the disk.
If you need to add more ressources, you will receive a new LIC file, so it is not important if you are,missing it on the disk.
However, if your system is power off and the disk is crashed, you will need a PCREGEN, the INL+LIMDISP file and the LIC file to rebuild your system from the beginning, and normally only your reseller is teached to do so.
Best regards