That seems to be an update from Elements 6-11. No upgrade from LE 6 is available from what I see.
You should be able to update your LE 6 to a current Steinberg Licensing version for free if you contact support. You could also try posting in this thread where many have been helped by @Matthias_Quellmann …
How/When shall I receive the Cubase LE 12 upgrade from LE 11 e-licencer - Cubase - Steinberg Forums
After updating your LE, you can then upgrade to Elements.
Keep in mind that Steinberg employees are most likely on holiday break at this time.