Adding [uploaded-files] under “File attachment” seems to have fixed that. It is odd that I have been using this plugin on two sites for over a year now and have never had to add that before. But I am glad it is now fixed and the plugin can be updated.
Thank you for your help and prompt replies.
In Contact->Drag & Drop Upload, I only see an option that says “Send Attachment as links?” That option is unchecked. Adding [uploaded-files] sends the file as a link. Is there no longer a way to send the file as an attachment?
That fixed the issue, thank you. Will that be a fix that will be implemented in the next plugin update?