[Updated Contents]
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v00.04.05.02.04 2023/02/28
-Added new nandflash driver and original nandflash compatibility
Looks like a minor update as only the last digit is changed in the version number. But the rev. history discloses more important information.
The reason for the previous version is now clear:
v00.04.05.02.03 2022/03/25
-add system file backup, solve the problems of red screen when booting, buzzer beeping, keyboard flashing
It must be a frequent issue, because there is related app note on the N.A. web site. And this is exactly what I'd experienced. It does not boot, red screen, and an attempt to apply the proposed fix results in buzzer beeping, keyboard flashing.
To my knowledge, v00.04.05.02.03 was never published. Assuming every update is cumulative, the latest version incorporates a fix for the red screen issue as well. For those running a version older than v00.04.05.02.03, it'll make sense to upgrade to the new version ASAP, just to be on the safe side. IMHO.