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Oh, okay, I thought it was recommended and necessary to flash this update because there are 239 packages to update.
If you say you updated without any problems, I'll do it too.
Thanks!
You download the image R1 from this site (https://www.egami-image.com/index.php?app=downloads&module=downloads&controller=browse&id=15) and after you can made the update to R4 from your stb.
I do it yesterday.