Hi, Marsha.
You did not state which version of PE Design you have.
If I understand this information I found on-line, you may be able to use converter software to change to the USB port B connector instead of a serial port. http://www.taltech.com/TALtech_web/support/usb2serial.htm (good reading when you have insomnia)
I do not speak "tech". Just looking for possible solutions so you do not have to buy a new embroidery program, unless you want to update.
Brother should be able to provide more information regarding converter software.
There is some information at Brother Solutions regarding v7, but not much on v8 - http://welcome.solutions.brother.com/bsc/public/eu/eu_ot/en/faq/faq_top.html?reg=eu&c=eu_ot&lang=en&prod=hf_design7euk
There are other software programs that do not require the use of a dongle. OK, so what's a dongle?
A dongle is an electronic key which allows you to run a computer program. They are little boxes which attach to a printer port. Inside are unique serial numbers that a computer looks at before you are allowed to use a proprietary program.
Pattiann