Have you thought about this one? I have never tried it.
http://www.fileviewpro.com/en/file-extension-idd
It has small database tables in a .idd format which seem to match up to a
package
'Complete Works' by Toplevel Computing
Dave Caroline
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No virus found in this message.
Checked by AVG -
www.avg.com
Version: 2013.0.2899 / Virus Database: 2639/6117 - Release Date: 02/19/13
-----
No virus found in this message.
Checked by AVG -
www.avg.com
Version: 2013.0.2899 / Virus Database: 2639/6117 - Release Date: 02/19/13