Orbix 3.3 uses a license code, not a license file. 
There are three product sets for Orbix 3.3, each with it's own license code: Java, C , or OTS. 
The licenses codes have the form: 00000000-11111111-22222222-33333333-44444444

When prompted, provide the codes to the installer.

If licensed Orbix commands like idl or orbixd fail to run, the license may have been entered incorrectly. 

To reinstall a license code after the initial installation is completed, run:
  UNIX:       install_license <app> <license code>
  Windows: license.exe <app> <license code>

For further details, see the Orbix 3.3 Installation Guide.