The new version of the forum software has now been installed. Sorry it took a little longer than anticipated. On my home system it was a matter of a few minutes to do the database conversion, but the live system took a little longer...
You will probably find you will need to log in again. The login button is right at the top of the screen above the title banner; one of the odd changes that are baked in and not easily adjustable. Once you're logged in, that's where you'll find the button that takes you to your private messages.
There are other changes...
One significant difference is that the layout should now respond better to being used on a small device like a phone or tablet.