In order to make some room on the homepage, the features which were previously in the “Options” box on the left of the homepage can now be found in the menus above the page.
Registering, Logging In/Out and News Feeds are on the lower menu under the header (that is, below the LAS logo/astronomical image/search box).
You can edit your user profile (e.g. updating your e-mail address, etc.) by clicking on your username on the very top-right of the page.
A nice by-product of this rearrangement is that these are now available on all areas of the site, rather than just the homepage.