Users already owning DPL Elite should be warned about the installation of DPL Essentials when installing Nik Collection V2. They must use the Cancel button when the Nik Collection installer tries to install DPL Essentials. Otherwise, their DPL Elite installation might be wiped out.
DPL Essentials and Nik Collection should be installed separately. Adding DPL Essentials to the Nik Collection installer is a mistake.