Product Key BW 14

We have been using BW when it was DOS.  We have, I think BW 14.  Our server has crashed and we are having to reinstall but we don't have the CD nor product key.  We do have a downloaded version that is still asking for a key.

So I have two questions; 1) How can we get a product key?  2) If we have been using network Business Works, can we just install as a standalone and still use our BW & company backup?