Occasionally you will start up Chi3D Worlds and see the following:

You may also receive this message when you are already in Chi3D Worlds.

If you click the OK button, the Chi3D Worlds Browser will automatically download the new version and install it. Once the upgrade is complete, Chi3D Worlds will automatically restart. If the auto install feature does not work for your browser, you can download the latest browser version at: http://chicago3d.net/downloads/chi3d41.zip

If you don't feel like upgrading right now, you can click the skip button instead. You will have a chance to upgrade again the next time your run Chi3D Worlds.

Sometimes, the skip button will not be available. This is known as a forced upgrade. Periodically, changes are made to the Chi3D Worlds architecture that make older browsers incompatible and therefore unusable. In this case, your only option will be to press OK to accept the new version.