This functionality is gone, or diminished (at best). In the old version right-clicking a file and choosing to "Send to Evernote" would upload the file to the default notebook. After re-adding the "Send to Evernote" function on my Windows 10 machine, when a file is sent, it is imported to a new folder called the same as the file name. and if I decide to import five files at one time, I get five new notebooks!
Two images included: one of the Send to Folder on my Windows machine; one of the five new notebooks.
I use this functionality ALL the time, but won't any longer as it has created a huge inefficiency in my process.