Fred K's February 27 instructions worked great for me as well. It rescued my Helios4 using OMV without any data loss. Thank you!
Someone had mentioned that they had trouble downloading
https://images.solid-run.com/A38X/U-Boot/v2024.04/2025-02-08_695f767/u-boot-helios-4-sd.kwb
I had trouble as well, but how was able to get it was go to the parent folder in that URL, then click on the u-boot-helios-4-sd.kwd file shown there, and that downloaded perfectly fine for me (not sure why the direct link didn't want to work).
