I downloaded the java client driver from the selenium website (2.25.0) http://seleniumhq.org/download/ . Unpack the zip file to the dir of your choice.
Start-up eclipse and select the project you are working on. Add the latest selenium jar to the referenced lib by going to Properties->Java Build Path->Add External JARs (select the selenium jar). To do things in a clean way I removed the references to the other libs that had been there along with the older selenium (2.24) and replaced them with the new versions. You can find the new jars under selenium-2.25.0/libs folder. Add them the same way you added selenium-2.25.0.jar.