Just purchased L10. Freebie packs won't install. says corrupt

[murgatroid]

Authorized Live. Downloaded and installed all the Packs that were available with the purchase. But when I downloaded a few of the free packs, I get the corrupt message... pack was created by a newer version. Newer version??? lol

I'm sure there's a simple answer to this. A cursory google not finding a satisfying answer.

On Mac. High Sierra

Thanks