Install, skip the licensing dialog.

Put the keymaker.exe and sys_cpt.dll in the \altera\71\quartus\bin\ directory.

Run the keymaker.exe to create license.dat.

Launch the program.

When asked for the license, "Specify valid license file", and browse to the
license.dat (e.g. \altera\71\quartus\bin\license.dat). Press OK.

You can do the same procedure (or verify the license status) from the "Tools",
"License Setup" within the program.

Enjoy.