It worked perfectly.
For those who are interested, this was my workflow:
My cameras were at version 1.03. I used Windows XP (other people reported problems with Windows 7 above) to upgrade to 1.05, then 1.10, then 1.11, 1.12, and finally 1.14.
After that, I switched to my Mac and went from 1.14 straight to 1.26. Then after that, 1.3
Done. I did it for 5 cameras. Woohoo, thanks Julian!