It should be obvious from my question that I am not talking about the "version" as you describe it (QuickBooks Plus or whatever). I know how to find that and it is irrelevant to this discussion. I'm talking about the "changes and improvements" that Intuit rolls out (monthly, as nearly as I can tell). I read somewhere that the most recent one was on November 6. My problem with not being able to view newly-uploaded PDFs in a Chrome tab began exactly on the first day that I used the program after November 6.

I checked the Chrome setting for PDF-handling a long time ago. It was and is set as you have advised, so that can't be the problem. Besides, if this is the cause, then why do files attached before 11/8 still display properly in Chrome? You are not reading what I have already written, and you are not thinking about this logically. As I have mentioned about a million times, it does the same thing on Chrome and Safari, Windows and Mac, on my company file, and on a demo company file that one QBO support rep had me try.

Everything points to a problem with the QBO program itself. Can't anybody there get to the bottom of this? Why doesn't the same member of the "QuickBooks Team" stay on this, instead of new ones popping into this thread and telling me to try the same things I already tried a week ago?

Our small church is paying a lot of money for this program. I work for free. I am losing my patience. Notice that I have stopped saying "Thank you" (the "team" member I reply to never comes back here anyway).