If you choose not to use the new version and owned a version of Nik Collection by DxO purchased since the release in 2018, you can always uninstall the new version, then download and install the older version again from your customer account (provided that your previous Nik Collection by DxO version is compatible with your current OS). There is no need to have duplicates, and installing two versions can lead to problems. Older versions of Nik Collection are overwritten by default when installing newer versions. This information applies to version(s): 2018, 2, 3, 4, 5, 6
