I do not own this product, but I found a link to the drivers.
Can you use the 64bit driver update that is on this link?
When going to the link below click on the "drivers" tab and it will open a list of all the available.
http://support.rolanddga.com/_layouts/rolandreports/_productsupportsearch.aspx?pf=Engraving%20Machines&pm=EGX-350