Cubase LE 4 download?

i have a tascam US-144mkII and i know from the website i got a LE4 license with it, i never installed it because back then, clueless. now i can probably use the program. my tascam still works and is active, is that all i need is the download and it will work? i don’t have a license # and the disc and paperwork is long gone, but from what i read the license is built into the tascam, or it will see it and know i have a license when i try to install?

any help is appreciated. a link, whatever. thanks.
dave.