Draftsight will not start - Error message unsigned add-in

Hi All,

Just installed Draftsight 64 bit on my system.  Downloaded and installed today.  I was able to use it for a while, but the next time that I went to use the program, I get the following error message:

"An unsigned add-in, ExportTableAddin.dll, has been detected, and will not be loaded. Only signed and authenticated add-ins are permitted."

Then the program freezes, or locks, and then needs to close.  It will not open at all.

I don;t even know what  DLL file is!

Can anyone helpme?

 

Thank you in advance!

Regards,

Eric