I own DS 5-QF and Premium Pants will this run on Windows 7 64 bit version or will I need to upgrade?

I strongly suggest an upgrade. Win 7 calls for commands from/to the program thru the documents folders and your version places those files in C: Program files- - NO longer used. Win 7 uses another place.

IT's likely you will experience mega headaches from your half decade old program on your new PC even with a LOT of expertise.

Kaaren