B450M Steel Legend Bios invalid format

Bios ver 2.63B release date 03/07/2019.
when using instant flash to upgrade bios, the error message is "invalid format". Does anyone have same issue ?

Yeah, I sent a support form in and, because you have to supply the specs for your entire rig, they focused on the new BIOS being support for 3rd gen ryzen, not anything else instead of what I had told them which was that my Instant Flash didn't even recognize the file because it wasn't named like the previous files (previous was B45MSTL2.50, this one was named B45STL_2.63B) until I renamed the 2.63B file to B45MSTL2.63B (but I obviously didn't flash with that renamed file) and that I wanted the new BIOS because everything up to 2.50 was missing correct DRAM profiles for my RAM but 2.50 did something weird where it wouldn't recognize my fan settings so it would just run them at full speed no matter what I tried.

Here's the quote from the email I got back from them:
"Update the latest bios is for 3rd generation of AMD , otherwise is not recommended"

New bios v2.60 is out today. Just updated and it fixes all problems I had previously. Fans are behaving normally now and no issues with NVME drives. Will try out for few more days to see if any issues.

Has anyone with Zen+ had tried 2.60 yet? I know it's probably just because it's not "officially" supported but I am wary of the "*ASRock does NOT recommend updating this BIOS if Pinnacle, Raven or Summit Ridge CPU is being used on your system." warning.

Thanks