There are no such things as "stupid" questions. However if you think your question is a bit stupid, then this is the right place for you to post it. Please stick to easy to-the-point questions that you feel people can answer fast. For long and complicated questions prefer the other forums within the support section. Before you post please read how to get help
You can upgrade to KDE SC 4.10 with the Kubuntu backports PPA. zerozero has the steps here, which have some precautions to make it less likely to not work as intended: viewtopic.php?f=109&t=124912#p684113. As always when upgrading in place, take a backup of any important personal files first.