Ran the DX9 version of game and it patched seemingly okay.
When trying to enter the Melee arena, game downloaded Montis map, then while patching terrain set (or right after), game crashed to desktop. The crash to desktop repeated several times when trying to enter Melee arena.
Ran the DX11 version and game entered Melee arena no problem.
After that, the DX9 version entered the Melee arena okay.
So, if you run into same issue with DX9, try DX11 before giving up.