You can try the following update site: https://github.com/aborg0/com.mind_era.knime.silhouette/releases/tag/v0.0.0_20180709
Usage:
- Unzip the zip file
- Help | Install New Software…
- Add…
- Local
- Select the location of the update site folder
- Select KNIME Silhouette feature (from the only KNIME cluster measures category)
- Next
- Next
- Accept the license if it is suitable for you
- Finish
- Accept that it is not signed (OK)
- Restart KNIME
DO NOT use it in production, its further releases will not be compatible most probably
PS.: Feedback, PRs, and an icon for it are welcome 