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RustyHill · 06-19-2025, 11:11 AM

OK, I didn't give up....☺

I set up K4PC 2.4.0 (70904) (Last updated 09.06.2025) and registered it. It prompted me to update, which I declined and set to 'Not auto update'.

I then synced with Amazon and got my library. Hunted for the books with the long files names (see previous posts) and imported the books into Calibre. Interestingly, they had d/ld as azw files and imported OK. I could then convert to Epub OK.

So RESULT. [But probably not for very long...]

As an aside, one book still failed to convert, appearing as an azw but Calibre thinking it was a KFX-ZIP. Odd.

Job: 0 Convert book 1 of 1 (The Demon, the Hero, and the War for Widdershins: A Mal & Reg Novel of Widdershins) finished
Convert book 1 of 1 (The Demon, the Hero, and the War for Widdershins: A Mal & Reg Novel of Widdershins)

DeDRM v10.0.9: Trying to decrypt yyes0dqe.kfx-zip
Decrypting KFX-ZIP ebook: yyes0dqe
Found 9 keys to try after 0.8 seconds
Decrypting KFX DRM voucher: amzn1.drm-voucher.v1.e50accb8-e4c9-4536-baa0-d7dac7224b6e.voucher
Decryption failed, trying next fallback
Decryption failed, trying next fallback
Decryption failed, trying next fallback
[deleted]
Exception: Incorrect padding - Wrong key
DeDRM v10.0.9: Failed to decrypt with error: Failed to decrypt KFX DRM voucher with any key
Traceback (most recent call last):
File "calibre_plugins.dedrm.__init__", line 950, in KindleMobiDecrypt
File "C:\Users\xxx\AppData\Roaming\calibre\plugins\DeDR M.zip\k4mobidedrm.py", line 204, in GetDecryptedBook
File "C:\Users\xxx\AppData\Roaming\calibre\plugins\DeDR M.zip\kfxdedrm.py", line 68, in processBook
File "C:\Users\xxx\AppData\Roaming\calibre\plugins\DeDR M.zip\kfxdedrm.py", line 112, in decrypt_voucher
Exception: Failed to decrypt KFX DRM voucher with any key
DeDRM v10.0.9: Looking for new default Kindle Key after 0.9 seconds
searching for kinfoFiles in C:\Users\xxx\AppData\Local
No K4PC kindle.info/kinf/kinf2011 files have been found.
DeDRM v10.0.9: Ultimately failed to decrypt after 1.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools...master/FAQs.md
Running file type plugin DeDRM failed with traceback:

So this seems to be the lack of a key but I thought K4PC had a default key built in....

06-19-2025, 11:11 AM	#1009
RustyHill Enthusiast Posts: 30 Karma: 10 Join Date: Feb 2023 Device: Kindle	OK, I didn't give up....☺ I set up K4PC 2.4.0 (70904) (Last updated 09.06.2025) and registered it. It prompted me to update, which I declined and set to 'Not auto update'. I then synced with Amazon and got my library. Hunted for the books with the long files names (see previous posts) and imported the books into Calibre. Interestingly, they had d/ld as azw files and imported OK. I could then convert to Epub OK. So RESULT. [But probably not for very long...] As an aside, one book still failed to convert, appearing as an azw but Calibre thinking it was a KFX-ZIP. Odd. Job: 0 Convert book 1 of 1 (The Demon, the Hero, and the War for Widdershins: A Mal & Reg Novel of Widdershins) finished Convert book 1 of 1 (The Demon, the Hero, and the War for Widdershins: A Mal & Reg Novel of Widdershins) DeDRM v10.0.9: Trying to decrypt yyes0dqe.kfx-zip Decrypting KFX-ZIP ebook: yyes0dqe Found 9 keys to try after 0.8 seconds Decrypting KFX DRM voucher: amzn1.drm-voucher.v1.e50accb8-e4c9-4536-baa0-d7dac7224b6e.voucher Decryption failed, trying next fallback Decryption failed, trying next fallback Decryption failed, trying next fallback [deleted] Exception: Incorrect padding - Wrong key DeDRM v10.0.9: Failed to decrypt with error: Failed to decrypt KFX DRM voucher with any key Traceback (most recent call last): File "calibre_plugins.dedrm.__init__", line 950, in KindleMobiDecrypt File "C:\Users\xxx\AppData\Roaming\calibre\plugins\DeDR M.zip\k4mobidedrm.py", line 204, in GetDecryptedBook File "C:\Users\xxx\AppData\Roaming\calibre\plugins\DeDR M.zip\kfxdedrm.py", line 68, in processBook File "C:\Users\xxx\AppData\Roaming\calibre\plugins\DeDR M.zip\kfxdedrm.py", line 112, in decrypt_voucher Exception: Failed to decrypt KFX DRM voucher with any key DeDRM v10.0.9: Looking for new default Kindle Key after 0.9 seconds searching for kinfoFiles in C:\Users\xxx\AppData\Local No K4PC kindle.info/kinf/kinf2011 files have been found. DeDRM v10.0.9: Ultimately failed to decrypt after 1.0 seconds. Read the FAQs at noDRM's repository: https://github.com/noDRM/DeDRM_tools...master/FAQs.md Running file type plugin DeDRM failed with traceback: So this seems to be the lack of a key but I thought K4PC had a default key built in.... Last edited by RustyHill; 06-19-2025 at 11:14 AM.