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Kindle KFX DRM Remove Failed and Solution

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It's been a while since the Amazon has released the new version of Kindle for PC/MAC(1.19 or later) to support the Kindle KFX format. You may have already know that downgrading the Kindle for PC/MAC to older version (1.17 or older) to sync the book to avoid the KFX format. However, you may come across the situation that you've already degraded the Kindle for PC/MAC to version 1.17 or older, but still can not remove DRM for these Kindle books. If you remove the Kindle KFX book DRM failed, please do not give up. The following guide will help you break through the dilemma.

Remove Kindle KFX DRM--Solution for Windows
Remove Kindle KFX DRM--Solution for Mac

Remove Kindle KFX DRM--Solution for Windows

If you have updated your Kindle for PC to version 1.19 or 1.20, you have to downgrade your Kindle for PC to 1.17 or older version. If you have already degraded the Kindle for PC from version 1.19 or 1.20 to 1.17 or older version but failed to remove the KFX DRM, you'd better to follow this guide as well.

Step 1. Deregister Kindle for PC

Open Kindle for PC, choose the "Option" from the Dropdown list of "Tools". When the "Option" windows has been open, click on “Registration" and then "Deregister". It will pop up a new window to ask "Are you sure you want to deregister?". Check the box before this sentence "I understand that deregistering will cause all content I have downloaded from the Kindle Store to be removed from this device." and then click on "Deregister" to finish the deregistration process.

deregister Kindle for PC

deregister

Step: 2. Then delete the folder-storage from your computer

To ensure all Kindle for PC related content has been deleted completely, please delete the folder--Storage from your computer. It probably be here: C:\Users\uername\AppData\Local\Amazon\Kindle\storage.

delete storage folder

Step: 3. Uninstall the Kindle for PC and install the earlier version of Kindle for PC on your computer

Uninstall the Kindle for PC on your computer at first. Then download the Kindle for PC version 1.17 or older version. Here is the download link for Kindle for PC version 1.17:
https://s3.amazonaws.com/kindleforpc/44170/KindleForPC-installer-1.17.44170.exe
or http://onlineconverter.epubor.com/KindleForPC-installer-1.17.44170.exe
or http://download.epubor.com/KindleForPC-installer-1.17.44170.exe

When the the Kindle for PC have been installed successfully, register it with your Amazon account information. To stop the Kindle app update automatically, click on Tools-->>Options-->>General-->>uncheck the box before "Automatically install updates when they are available without asking me" and then click on "save".

stop kindle for pc update

Step: 4. Download the Kindle book via Kindle for PC version1.17

When you have open the Kindle for PC version 1.17, you will find all your Kindle books have been deleted. You just have to re-download them to your computer again via Kindle for PC version 1.17.

Step: 5. Run Epubor Ultimate to remove the DRM

Download the Epubor Ultimate for free:
When you have downloaded the Epubor Ultimate for Windows, double click it to install it on your computer. When you open it, your downloaded Kindle books will be automatically detected and displayed on the left column. To remove the Kindle KFX DRM, you just have to drag the books from the left column to the right column. All Kindle books will be decrypted successfully.

Remove Kindle KFX DRM--Solution for Mac

If you are using the Mac, there will be a slight different from Windows.

Step 1. Deregister Kindle for Mac

To deregister Kindle for Mac, open Kindle for Mac-->>preference-->>General-->>Deregister. It will pop up a new window inquiry whether you want to deregister. Check the bok before the sentences " I understand that deregistering will cause all content I have downloaded from the Kindle Store to be removed from this device." and then click on "Deregister" button to finish the deregisteration process.

deregister kindle for mac

delete kindle books on mac

Step 2. Delete all files from Kindle content folder

If you do not change the directory of Kindle content folder, you can use the following command to delete all files in Kindle content folder. Open terminal, and then copy this command rm -rf ~/Library/Application\ Support/Kindle/My\ Kindle\ Content/* to the terminal and then press on “enter" to delete all files in Kindle content folder.

If you have changed the directory of Kindle content folder, you have to find the folder and delete all the files manually.

Step 3. Uninstall the Kindle for MAC

Open the Application folder at your Mac and then move the Kindle for Mac app to the trash.

Step 4. Delete configuration file of Kindle for Mac

Open the terminal and copy the following command to the terminalrm -rf ~/Library/Containers/com.amazon.Kindle/Data/Library/Application\ Support/Kindle and then press on “enter”.

Then copy this command rm -rf ~/Library/Application\ Support/Kindle and press on “enter” again.

All configuration file of the higer version Kindle app has been deleted completely.

Note: For all commands in this article, do not type them manually. Please just copy them to the terminal to ensure they are not mistyped.

Step 5. Reinstall the older version

Download the Kindle for Mac version from the following link and install it on your Mac.

Kindle for Mac v1.17 download here:
http://onlineconverter.epubor.com/KindleForMac1171.dmg.zip
or http://download.epubor.com/KindleForMac1171.dmg.zip

When the Kind for Mac has been installed successfully, register it with your Amazon account information.

To stop the Kindle app update automatically, please open Kindle for Mac --> tools --> options --> General, then un-check "Automatically install updates".

stop kindle for mac update

Step 6: Download Kindle books via Kindle for Mac version1.17

When you have open the Kindle for Mac version 1.17, you will find all your Kindle books have been deleted. You just have to redownload them to your computer again via Kindle for Mac version 1.17.

Note: For all commands in this article, do not type them manually. Please just copy them to the terminal to ensure they are not mistyped.

Step: 7. Run Epubor Ultimate to remove the DRM

Download the Epubor Ultimate for free:

Install Epubor Ultimate for Mac on your Mac to remove the DRM.

remove Kindle KFX DRM on Mac

If you still have any problem with Kindle KFX format, please share with us in the comments.

author

joined Epubor since 2017. She always wants to share everything related to ebook reading and improve your reading journey.

2 Comments
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08/6/2017 13:49:15
Never going to happen! I will never follow such a ridiculously inconvenient procedure simply to make your program function.  A MUCH better solution is for Epubor to FIX YOUR SOFTWARE so that it works without my having to downgrade my Kindle app, erase 600+ books, reinstall Kindle software, load each of those 600+ books again, then run your program.  If you think that's going to happen you're smoking some really funny mushrooms!
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08/9/2017 09:23:18
You are welcome. We are glad to know it works for you!
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