Hi Tricia,
Thanks for your comments and feedback on this. Fortunately, our server issues are few and far between...but you know...even the almighty Google goes down from time to time

Our requiring the link to remain instact is a pretty standard request, and considering the amount of work that went into creating the program, is a small one at that.
Because the code for the calculator is hosted at and provided by our website the feature would go down with our site regardless of the link - the link has nothing to do with whether or not the code functions. It's a server-based program.
Thanks again for your note