Vector tracing can be done with most vector editing programs. It can be done by hand or automatically. The first method will give you professional results but can be time consuming. the second method will give you amateur results but is quick.
A search on Google for "vector tracing" returns 1,850,000 results. The only problem you have with Sign Go Lite is that not many people here use it, so you won't get much in the way of support or help. Many people use Adobe Illustrator and CorelDRAW or any of the signmaking programs such as FlexiSign or SignLab.