I am using wp 3.9.1 and your plugin version 1.05 . Currently I am having the problem that I added several categories but only two of them are appearing in the "All Media Categories" filter box... Any ideas ?
When I go to "Media Categories" and click on the "no. of files attached to the category" Column "Media" I get to my pictures associated with this category, so this works fine -even though it displays the count as 0 which I dont really care about and probably is related to my way of associating the images to the categories ( via mysql hack - for bulk editing ). But the categories themselves are addded through your plugin functionality and don't get displayed... Or do they not get displayed because count is 0 ? I will try and find an answer to this last idea quickly.