Export/Import Tool by JNeuhoff

I'm using the Export/Import Tool of JNeuhoff and it works perfectly for updating existing products, but is it possible to add new categories, products, etc?
When I tried it, the new products show up in the front-end but not in the backoffice.

If not, is there an affordable tool to import Excel or CSV data into OpenCart version 1.5.2.1?

I also tried apsona-shopadmin-addon, but this doesn't seem to work as well...

Nobody?

Is there a way to add cost price from cost price mod to export/import?