I have got the exactly the same error message after upgrading to the latest release this morning
Argument #2 is not an array in /home/woody/public_html/wp-content/plugins/download-manager/modules/server-file-browser.php on line 8
I don’t want to to go edit this file, as I assume you are going to fix this error?
This error also seems to have the knock on effect of not being able to add links to posts and search for images.
