CorelCAD: AcSignIcon.dll

Windows Vista Home Basic, SP2 (my other computer)
CorelCAD 2014

Every time I run CorelCAD, I am notified that my version of AcSignIcon.dll is inadequate and that I should follow the provided link to download a new one. However, the link gets redirected at Autodesk and I can't find a file to download.

I've searched the web for this dll file, but am uncertain which one to a) trust, and b) actually download.

Any guidance? Thanks.