Unfortunately no, I made copies of the save files only, but not blueprint-storage.dat.

Will make copy of entire roaming/Factorio folder next time, if it happens again.

Game crashes when loading a save.
I'm able to load the save on one of my other machines (call it B), but not on the original one (call it A).

I was playing the game mostly on machine A, with no mods enabled (although with "creative mode" mod installed but not enabled on machine A) and with no mods ...

I've confirmed that changing the value from 01 to 00 still works on 0.15.9.

If you have trouble finding the correct byte, here's what worked for me.
https://i.imgur.com/si92mfZ.png

On 2 save files, that I tested it, the 01 byte that denotes disabled achievements, was at 49 (in hex) length ...