Removing DRM from Amazon topaz file: Error: 'Authors' DRM Removal Failed.

[hampage]

I´m receving an error when I try to remove DRM from an Amazon bought book with topaz format. Here it is:

Trying: J2DD6NV4

Trying: 4zzZb+4M
Book Key Found!

Processing Section: img
. . . . . .
Processing Section: color
. . . . . .
Processing Section: other
.
Processing Section: dict
.
Processing Section: glyphs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Processing Section: page
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Processing Section: metadata
.
Successfully Extracted Topaz contents
Updating to color images if available
Creating cover.jpg
Processing Dictionary
Processing Meta Data and creating OPF
Error: 'Authors'
DRM Removal Failed.


I´ve tried SKINDLE but it´s crashing!