Very recently (sometime in the last month perhaps), the Dropbox-related context menu items I normally use disappeared. The only one that shows now is "Send with Dropbox Transfer", which might be new - I'm not sure. In File Explorer the items still show - in the "new" view they are on a submenu, and in the "old" view (what you get when you click "Show more options") they look like DOpus used to look until recently. I first reached out to Dropbox support, assuming that the menu was the same in File Explorer, but when I noticed that it was different, they said they don't support third-party software (which is fair) and pointed me your way.
I use Windows 11 Home. When this started happening I was on DOpus 12.30 (but not during an upgrade - I had been on that version for much longer), but upgrading to 12.31 today didn't solve it.
Here are some screenshots. First, what it looks like in DOpus:
Then what it looks like in File Explorer default view and "Show more options" view:
