Just in case, this might be helpful for some of you having patch installation troubles...
I found that after I had installed the patch before opening CAW it seemed to install correctly. I placed a few roads and empty lots in the CAW editor and tried to go edit the map in the game. It gave me an error that said my game was incompatible and needed to update. I tried to run the update and it gave me an error. I then closed out of CAW and reran the update in the launcher, it worked. I was able to get back into CAW and proceed into the game to edit the map.