"Large" Toolbar Icons - They look BAD!

Is there anything you can do to improve the "Large" toolbar icons?  The artifacted/jagged look of the icons makes the application feel cheap and dated.  Additionally, for those folks that are visually impaired, the icons' are often difficult to interpret.  I have a feeling that the code is simply blowing up a small icon, rather than utilizing the proper size.
 
 
Please provide this additional data: 
Exact HyperSnap version in use (from Help/About menu): 7.11.01______ 
Windows version in use: 7 SP-1______