I just downloaded this and got it open successfully.
I spot-checked pages throughout the final PDF and everything looked good, no scrambled text or any such problems that I could see.
I did initially have a problem when I tried to copy-and-paste the password. So I opened Notepad (I'm on Windows) and pasted the password into it. Turned out somehow one or two extra blank spaces had attached themselves to the end of the password. So watch for that potential problem.
to the OP for doing all this work! Now I'm off to find the section about my ailing rear power window...