We stopped supporting the AMBER Input Configurator because the field of classical dynamics simulations is moving very rapidly, and we were finding it hard to keep up. That is, the recommended set of inputs, and their inter-relationships, keeps changing, and might differ from one simulation engine to another (e.g., sander vs pmemd). This is particularly true since portions of the code have been ported for execution on GPU. We would love to provide such a service, but it will probably need to wait until someone teaches a computer how to read the AMBER manual.
If you desperately need it, the old version is archived, at least as of the time of this writing, here.