What's going to happen when Internet Explorer ends tomorrow?

@Evalen - The Launcher still (currently) works. You are able to still download and add content to your game. Since the launcher is needed to upload files, as long as people are still adding content to the exchange things are good. So, kind-of use that as an unofficial gauge for if the launcher is working.

On a different note, if you already have the SimPacks downloaded, you can bypass the launcher for installing content. Just double click on the pack itself and the installer (small black screen) will start. Afterwards, the launcher will appear to show the content has been installed (or failed).