try changing the default carving bit for the project to the 1/32" bit and see if you can see a sharper image in Designer. I did this a few days ago when someone had issue with poor carving quality with too small text and there was a noticeable improvement in the as displayed carving due to the smaller bit allowing for greater detail.
A Series machine purchased in 2007
had 30 minutes running time up till 2-13-15
Ring Neck Blues DC Insert (outstanding job keeping machine clean!), HF DC blower
Designer 3.102, Pattern Editor, Pattern Sculptor, STL Importer, Scanning Probe, 2D Vector Drawing Suite, 3D Pattern Modeling Suite, Centerline text, Conforming Vectors, CarveTight Chuck, Decorative Bit set
Universal Laser ILS series laser engraver with dual laser cartridges 135 watts total with 24" x 48" table and Class 4 module