<<Disclaimer: Verify this information before applying it to your situation.>>
Appreciate the clarification - yes, you can delete recipes you don't use
from the MasterCook files you save. Most people suggested making your own
cookbook with the software of recipes you have imported, typed in on your
own, etc. that don't include the ones that come with the software that you
don't care for.
One woman mentioned buying the 6.0 version at Target for $20, Cooking light
magazine advertises their version for $40, OfficeMax and other retailers
would likely carry this popular program.