Very little difference between Signlab 9.1. Their is a lot of things Cadlink should of done with this but only seem to have add a few more add ons (that can be added to 9.1) and made it 64 bit compatible. I have ran both 9.1 and 10 together and the speed difference is very small if any at all. I was hoping that they would sort out multiple instance but unlike corel and adobe this still opens a completely different window. Come on Cadlink please try harder. Cadlink have undervalued Signlab now as prior to this and still, their are some great offers which as a loyal customer feel cheated having to pay full price for. SC