My game was also crashing to desktop when I tried to create or load a game. (I have a retail copy of the base game, but an Arr'd copy of WA.) Replacing my cracked WA .exe with the original (and using Awesomemod to bypass the CD) also fixed my crash-to-desktop issue.

Editing the Resource.cfg file and moving the contents of the DCCache into the mods folder worked for all my downloaded content (purchased or otherwise), with the exception of Riverview. I tried copying the contents, so it was in both locations as Simsample suggested, but it made no difference. I then installed Riverview via the Launcher, and though it said it installed properly, it is not in the drop-down menu for town templates.

I have not tried downloading Riverview from the exchange, and probably won't bother. If I can get the CAW to work, I don't need their templates anyway, I guess.