I have been having problems since I was forced to reload DS a week or so ago.  So I decided to clear out all DS files and download all over.  That may have been a huge mistake.  My Mac now won't allow me to install the software because the developer is unrecognised.  So now I have no way of producing drawings or even opening, reading or printing old drawings.  If this isn't resolved quickly, I shall be forced back into the arms of Autocad.  I am so hoping that doesn't happen but as a professional user of his software on a daily basis, my business depends on reliable drafting software.

Any ideas?