Maybe is there a possibility to delete/remove all products that are included in an CSV/XML file.
With this you can delete all products that are nog longer available with my suppliers...
May 09, 2016
As a quick decision: use special attributes as a marker.
Option 1: Please choose any attribute and set any value in Expression - during the import.
Don't forget to turn on attribute presentation for the Product grid - "Sho additional attributes on the grid"
this option is available for PRO \ Enterprise version of Store Manager.
Option 2: Try to change CSV file before import - for example - modify date or add date
When import will be executed you'll be able to filter imported product by column in the Product Grid.