Just upgraded to the 2.6 client on a Windows 10 64bit machine from 2.5.3.
The context menu is now gone after rebooting and reinstalling / uninstalling both clients it is just gone. Any clues?
I had to remove the sync folder from the client app then add it back for the context menu to show up… was a little scary but it didn’t remove any files (it says it won’t)… then it was back to checking files and sync’d right away a new file.