Hi, I want to inform the steinberg team that the Plug-in Reference manual in PDF format is not available for download.
Following these links you get a page with 404 Error
https://steinberg.help/cubase_nuendo_plugin_reference/v10/en/Cubase_10_Plug_in_Reference_en.pdf
https://steinberg.help/cubase_nuendo_plugin_reference/v10/it/Cubase_10_Riferimento_dei_plug_in_it.pdf