When I try to drag and drop to my desktop or any folder outside of FileZilla, I get an error:
Could not determine the target of the Drag&Drop operation. Either the shell extension is not installed properly, or you didn't drop the files into an explorer window.
This was working previously, I've been using FileZilla for years. I was using it last night and it was working fine. I've tried reinstalling FileZilla, I've tried restarting the computer, I've tried re-registering the shell extension, which is a solution I found online. None of these have worked. (re-registering the shell extension, such as what's found here: How can I install filezilla's shell extension?)
It does work when I drag and drop to a folder on my computer within FileZilla (using the left local directory within the FileZilla UI).