After latest Dropbox update, documents on Mac are set to open with Dropbox by default

Walter — thanks for the response! I've rebooted my computer as well as the Dropbox App to no effect.

Here's the status of the dropbox app (from the menu bar icon):

Everything seems fine and up to date. Here's some additional info I noticed in the meantime:

The files and folders that were "Available Offline" before i updated Dropbox and re-indexed all the files are fine.They behave as they should, and Dropbox is not on top of their "Open With" list.

The files and folders that were "Online Only" before the update and re-indexing are the ones behaving in the way I described:

• When I make them "Available Offline", they try to open with Dropbox on double-click.
  (I know this because if I quit the Dropbox Desktop App, double clicking any of these files will re-open it.)
• Dropbox is on top of their "Open With" list, but the correct app still has "(default)" next to it. If I open the Inspector window, same thing. (See below.)
• Clicking "Open With" and selecting the correct application opens the file as it should, but doesn't fix the problem.
• Clicking "Always Open With" and selecting the correct application opens the file as it should and fixes the problem for that one individual file only, not the entire file type.

So, the upload and download work fine. The toggling between "Online Only" and "Available Offline" also shows no issues. No data is lost, the files work well. The only problem seems to be that the files that were "Online Only" before reindexing are now forever marked to be opened by Dropbox by default, while he files that were "Available Offline" before reindexing behave the same as before. I'm certain this part is key to the mystery somehow, I'm just not the detective to solve it.

Please, help!