Your designs should have a .pes in the name. Do not change this, it is the format your machine reads. You need a computer program to see the designs as pictures, or copy them to a card or usb that will go into your machine which will read them, perhaps one at a time. Wilcom have a free program to resize designs called Truesizer, which will open them, again 1 at a time. I use Buzz Tools, it will display many designs, and you can change colours, but costs.
pm me if you need more info.