Re: Help installing Riverview

@emiliebkrogh  Please try installing Riverview in a clean user folder.  Move the entire Sims 3 folder out of Documents > Electronic Arts and onto your desktop, open the launcher to spawn a clean folder, download a fresh copy of Riverview, and install it.  If it works, download and install your other worlds, one at a time, and see whether they load too.

Moving the Sims 3 folder will prevent the game from loading your saves and other data.  But the files will all be intact, and you can move over anything you'd like to keep to the new folder, that is if your Store worlds work correctly in the new folder.  (If not, you can trash the new folder and put the old one back, restoring everything to its previous state.)  Here's a description of everything in the user folder, so you know what to preserve:

https://sims3.crinrict.com/en/2011/01/faq-user-files.html

If you need more detailed help with the process, just ask.