You may run into an issue after upgrading to K2 4.5 and trying to use the web based Silverlight Designer. When hitting the designer, you are prompted to download and install SilverLight 3.0 and that is all well and good until the installer starts and fails with no explanation.
Thanks to the guidance from a K2 tech sales contact, what is actually happening is that there is a failure when the 3.0 installer goes to uninstall SilverLight 2.0. In order to fix this
- Go download the Microsoft Installer Clean-up tool
- Open the tool from Start > Program Files
- Remove Silverlight 2.0
- Rerun your SilverLight 3.0 installer
And now, you should be ready to rock with the cool K2 Web Designer!