@bruja_phoenix
I explain you what I do to update, in case you want to try again
- Put the update.zip file in the main root of the device, not in an SD card.
- Safely disconnect your device and go to settings--->Update
- Choose update from local store
If everything is correct, the update should start inmediately.
Don't try to update from the SD card. I had problems with that.
It worked on both, M96 and T68, each one with its proper update file. It takes a while, about 5-7 minutes.
After that, when you "long press" on a PDF or EPUB file Onyx Neo Reader is avaible to choose.