When trying to install K2 Client Tools, the screen to choose Client Tools install or Full install is not seen. The Setup Manager goes directly to the License Key page.
The screenshot below shows the Installation Type, which should be seen.
To fix this, Open your registry and look for the SourceCode node under HKLM\Software and delete it.
Also check the HKLM\Software\Wow6432Node and delete the SourceCode node from here as well.