for those of you still having problems, firstly what you need to do is download the update patch from over here:

after that you need to change the sku version of your game to 2, you can do that by typing regedit in the run window and then HKEY-LOCAL-MACHINE/SOFTWARE/Sims/The Sims 3/SKU

after changing the sku version you can update your game with the patch downloaded above, if you get the following error "Update error, Invalid file found", dont worry and proceed on with the installation cause the error wont effect the installation process, after installing the patch you need to change the sku version of your game to 7 and finally install sims world adventures

Hope this works.