Web of Science will be upgraded this weekend and the interface given a new simpler look. You will still be able to do the same searches but may find that options have moved. We will provide updated guides as soon as possible. One improvement is that it will be easy to spot open access articles which are free for anyone to access.
The name Web of Knowledge for the collection of databases will be dropped and the whole system will be known as Web of Science. The databases we usually think of as Web of Science will be known as the Core Collection.
There may be some disruption on Sunday afternoon / early Monday morning while the upgrade takes place.