Some of my Dropbox folders have stopped uploading. I first noticed this today when I tried to copy a dropbox link from within Windows Explorer on my Windows 10 PC. The "Share", "Copy Dropbox Link" and "View on Dropbox" options were all missing when I right clicked on the folder. I checked several others that previously had allowed me to copy links - some were Ok, others had also lost the right mouse options. I then noticed that although Dropbox said it was up to date and had finished syncing, the files and sub-folders I'd been working on had not uploaded. I moved some of them to another folder within the Dropbox directory and this time, they did upload and sync with my wife's PC. I copied them back to the original folder, which still would not update.