ssmith181:
Use this link to download and install PULSE AMBASSADOR. It is a free resizing program and has a measuring tool in the tool box. The printed sheet will give stitch counts and show color changes. The link is http://www.pulsemicro.com/ambassadordownload. Have fun.
Resizing should be limited to a very small percentage to avoid distortion, thin coverage or "bullet-proof" designs (stitching jammed on top of each other).
It would be best to split the larger design and re-hoop as needed. For that, an editing software program is required.
Embrid is one company that offers a free trail of Embird Base, which includes splitting.