Ist it still possible to upgrade from my full license to an ultimate?

[Stordyr]

So... I bought FGII like 3 years ago... and I'm currently considering an upgrade.
Unfortunately I can't find the option in the store.
It's just available on steam BUT I don't have my current FGII on steam :)
So what can I do?

[damned]

Launch FG and at the Splash Screen can you see an Option there to Upgrade to Ultimate?