I had my extensions hidden, but I was able to save from a txt back to a .cfg. When you are in the text file, choose "Save as" and then there should be a drop-down box that mentions file type. Switch to make it say "All Files" before saving as Resource.cfg.   That worked for me at least, if I ignored that step it only came out as resource.cfg.txt.

     I ended up taking my DCC folder out after all, as Riverview wouldn't show up. And when trying to install it through the Installer, it would result in a game crash. I'll assume because of it showing up in two diff. folders, (Wherever the launcher put it, plus my DDC folder in the mods folder)

I am not a hacker or modder but I got my CC to work.  What I did was I copied my resource.cfg files to my desktop.  I had 2, I have always had 2 and I have no idea why or how, but my CC has been working so why change what ain't broke?

BACK UP!! your DCCache, your Mods folder, saves, and resource.cfg files.
Copy your resource.cfg file/s to your desk top.
To edit your resource.cfg you have to change .cfg to .txt and say okay when the computer yells at you.
Just copy and paste this into your resource.txt

Priority 500
PackedFile Mods/Packages/*.package
PackedFile Mods/Packages/*/*.package
PackedFile Mods/Packages/*/*/*.package
PackedFile Mods/Packages/*/*/*/*.package
PackedFile Mods/Packages/*/*/*/*/*.package
PackedFile Mods/Packages/*.dbc
PackedFile Mods/Packages/*/*.dbc
PackedFile Mods/Packages/*/*/*.dbc
PackedFile Mods/Packages/*/*/*/*.dbc
PackedFile Mods/Packages/*/*/*/*/*.dbc

Click save and then rename the file back to resource.cfg.  Place it back in your Electronic Arts/The Sims 3/ World Adventure folder.  

I have another resource.cfg file in my Mods folder/Files. I made it look like this:

Priority 500
DirectoryFiles  Mods/Files/... autoupdate
PackedFile Mods/Packages/*.package
PackedFile Mods/Packages/*.dbc

I have no idea if I need it, so skip this if you do not have one there.

Then I copied my files in my DCCache folder into the Misc folder under Mods.  I have no idea if I need to delete the DCCache, I didn't and things were working well.

I will update this if people tell me it is wrong, but my game is working, my CC is showing up, I do not lag horribly and my load times are about the same as before.