Embed ISRC code in Cubase Pro 11?

Hello Cubase users. I’m asking again about embedding ISRC codes in my wav or mp3 files.
I note that the Wavelab manual says ISRC codes are only for CDs.
But I think this is incorrect, as I have a distributor asking for my audio files with embedded ISRC.
I do not have Wavelab. And according to this discussion (Dec 2020), there is no way to embed them on Cubase. Is that still correct?

Apparently, it can be done with this free software download…

Is this still the best option around? (Seems to me like a major omission if Cubase Pro cannot do this simple task. Apparently, Sequoia has it built in.)