In the past, the launcher has been updated because of an update. But today? Why?
Have you already updated to 3.3.02 without this new launcher?
I also received the instruction to download a new launcher. I'd previously installed 3.3.0.2 successfully. Maybe this new launcher is a sign of future patches?
The previous launcher update was optional, didnt nag, and let you play (even today)
Just loaded it up again, and the download is now mandatory.