Upx updates flashable via "adb"?

Hi. Want to downgrade my Onyx and I want to be sure the update.upx files can be flashed through “adb” or if it has to be done with rockship tool, or another way.

Any info about that will be welcome
Thanks

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Generally speaking, it is not recommended to downgrade the firmware. If you downgrade the firmware, you may come across some bugs or even lose some data since there is something different in the new firmware. If you come across some bugs or you are not satisfied with some new features on the latest firmware, you are suggested to submit them on Feedback (Settings/ Feedback) or on Onyx Bbs via http://bbs.onyx-international.com/.

Thanks Claire, but there are many things I want to change from 2.2.2, so the list is not short. Sure I can report the list, and I will, but until all this things change I need to downgrade to be able to enjoy the eReader.

And also, still have the question non answered

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No one knows it?

Please, I really need this info.
Thanks