There's a problem with the ‘Per Product Shipping' I think… If you set a product as ‘Variable Product', add some attributes & then go to the ‘Variations' tab to add the different variations per attribute, there is only a Shipping Class field (as there is on a standard product without the plugin), no shipping costs, etc.
Surely this should be there as part of the plug-in?
Variable product is not supported in current version of Per Product shipping addon. Sorry for inconvenience. At this moment, firstly you can add shipping cost then change the product from simple to variable. Hopefully we will add this feature in next update. Thank you..
I already informed it and its in our to do list. Lots of bug and new features is already in our to do list. Our development team is working hard. We will add this feature as soon as possible. Thank you..