If the original owner provided everything to you - including all documentation that might have the activation code for the Graphtec software, I would go that route. If you don't have that, Sign Blazer Elements is free and will get the job done. Some people like Vinyl Master, some Sure Cuts a Lot, a few Easy Cut. You just have to find the software that feels good to you. You should be able to download the trials for most of them and test drive them before you have to make a purchase - unless you go with Sign Blazer, that's just free.