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Thank you. Went smoothly... The NVR starts up the wizard on first login after the downgrade, but you can just exit out and all is working well with previous config. Hik-Connect app working perfectly again! Let's hope the new firmware issue is fixed soon.

I also have this same issue. I'd like to downgrade back to 4.5.1.025 but I am not sure how. Can I use the usual NVR firmware upgrade method (will it accept the older firmware file) or must I use some other workaround (I see some reference to this TFTP tool - but it seems specific to...