Reinstalled the Dropbox app and it wants to rename my Dropbox folder

I think all the screenshots that I have sent have shown all that I have gone through. However, in a reply earlier today, I had also mentioned the poor functioning of many of, if not all of, Dropbox's dialogs. I CANNOT, copy the mess they make on my screen. The buttons as well as other controls are 1. duplicated and one must learn which one really is what it seems; and 2. NOT duplicated and one must learn which area to hover over before clicking. Pretty ugly and something I would dream up as a practical joke and never use.
Whatever. I'm now sure that I had messed up something early on because of the twisted programming. Again, I'll note that it doesn't seem easy to get a screenshot of the things!
I now realize that the account on my computer had been changed somehow in all the machinations I had gone though and I think if I could change my account back to what it was I would be fine. But I don't know what to get on THIS computer to send to my other computer and where to plug it in on that.
Meanwhile, I'm not going to risk losing more by updating this computer.

Hey muddleglum, I've been reading through this thread, trying to figure things out, but I need some clarifications.

What do you mean by "doubling"?

Also, you mentioned the following: "I tried "Choose another folder" got another dialog box that allowed me to type in a new name, hit enter, then another dialog box came up saying that it cannot make a new folder."

Can you let me know what you typed in as a name and send me a screenshot of the next dialog box that said you cannot make a new folder?

Doubling? The below has already been sent. Notice the right side is doubled -- the table is pretty clearly doubled. However, this is the only screenshot that I could capture even a portion of the doubling. Note that the left hand table is the one added to this dialog box. Note also that it is smaller (see the difference of the cup handles?) and set higher. Remember that height (HT) -- it is the difference between the real and fake buttons (that you cannot see).

Do you see on the left the checkbox with the text, "Save files as online only"? To click that, I had to scout around beneath the "Done" button below that, to find the blank area where I could uncheck the checkbox. I now know that it was HT below it and, I think, a bit to the side. The "Done" button, itself, was doubled and about the same height HT away and smaller as the cup handle is smaller.

Confused? I certainly was. See beneath this screenshot for more discussion.

I'm fairly sure now that on a previous dialog that I clicked the wrong thing. No, I clicked the right thing, but not the right place on the dialog box where the real button lay hidden. So, after I found I couldn't get out of that dialog box by clicking obvious buttons, I hit return. I ended up getting a new account and your program tried to use my real account. I don't know how to get out of this now, and back to my old account. (Note that all this is happening on another computer that is still hooked up with my old account.)

Hey muddleglum, here's what I'd suggest.

I suggest that you perform an advanced reinstall using these steps. 

When you reach step 11, which is the re-installation part make sure to remove any old Dropbox folder copies from your directories.

If you have any content that you think hasn't been synced to your account online, make sure to keep a separate copy on your hard drive. 

Then, reinstall the app and allow for the content to sync from scratch. This might do the trick.