Unfamilira with any NVRAM prog except the notorious Chinese MiniPro XGecu.
Beware of pulls, rebrand, old NVRAM. Mouse/DK are reliable sources.
If the scope is in CAL, the image is useful.
If not, or if the image is curropted/lost a recalivbbration may be needed.
See many long theread in EEVBLOG, esp "2465B teardown" 79 pages.
Suggest to mirro your screens, error messages, here and to groups.io: Tektronix and Tektronix2
Bon chance
Jon