Converting Files for CutStudio

[noppynoo]

Hi guys, I've been using a Roland Cutter with CutStudio for a long time to do very basic shirts for sport. I used to have a guy who would convert files for me, ready to go with CutStudio, but unfortunately I've lost his details after an email overhaul! I am in desperate need of someone else to help out - specifically have a jpg file that is very poor quality once imported to CutStudio and enlarged. I know this is probably something very basic, but so am I hahahah! Any help on someone out there who could do this for me would be awesome. Thanks )