As of VFX Suite 2023.3.0, Knoll Light Factory is discontinued and is not distributed as part of VFX suite.
If you have a previous installation of it, it will remain available to you for legacy project compatibility.
No future support or updates will be provided.
Going forward Red Giant's Real Lens Flares plugin should be used for new projects.
Q: How do I reinstall Knoll Light Factory?
A: If you do not have KLF installed and need to reinstall it, you can do so by installing version VFX Suite 2023.2.0, which was the last VFX Suite version that had Knoll Light Factory in it. Afterwards, you can then (re)update to the latest version of VFX Suite, and Knoll Light Factory will still be present in the effects menu, however it will not be updated to work with anything later than Adobe CC 2023.
To install VFX Suite 2023.2.0, select Install > Other Versions from the elliptical menu across from the VFX Suite in the Maxon App (note this option is only available if no VFX Suite is currently installed).
Then select VFX Suite 2023.0: