In what game folder? Was it an unmodified release 0.10?I just downloaded Update Only (v0.10.X -> v0.11.1) [1,65 GB] and put it in the game folder
Did you merge the source "game" folder into the destination "game" folder overwriting existing files when prompted?
Or did you created a "game" subfolder inside the destination "game" folder?
HINT: if the OS did not prompt you to overwrite existing files... Chances are that you did this mistake (or a similar one).
In applying the patch there's some overwriting involved.