Some time ago I downloaded the BIOS ver.61 for NUC7i3BN, currently the latest BIOS available on the Intel website is ver.60
What happened with ver. 61 and is it safe to use ver. 61?
Similarly, with the BIOS for the motherboard NUC7i3DN, I downloaded the BIOS ver 35 and now the latest available BIOS on the Intel website is ver 31.
I understand that you are unable to find the BIOS version 0061 on our download center page, I apologize for the inconvenience.
Regarding this, what happens is that it is possible the .bio file needed some changes that needed to be done. If you have that BIOS version and the unit is working fine then there is no problem or risk at all, however, if you are having problems while using that BIOS version it is recommendable to rollback to a previous version in the meantime while the BIOS version "0061" is updated.
I hope you find this helpful.