No longer works for Commerce Products.

Hmm.. so easy to see why this broke. 1.7 had a plugin for nodes and commerce products ONLY. And the file for Products was lost in 2.x branch.

This raises a bigger question which is this the right architecture for this module? Not very extensible if you need to add a separate action for each entity type. I don't think the Entity Clone module works this way. I think the entity defn simply requires "duplicate" annotation in entity definition. Which a patch is required to add this for Products, but it is there already for many common entities, Perhaps a better approach would be to use Entity Clone a bulk operation.

I guess there is now a Replicate UI module which i think replaces this module.