TagDisk HD to Dropbox problem

I have installed full version of TagDiskHD and it works perfectly
I then wanted transfer the video files to my windows 7 PC from my Ipad2
I was told to use Dropbox so I linked my Dropbox to TagDiskHD
I can now see my Dropbox files in TagDiskHD but I have not been able to transfer my videos to the Dropbox folder
I can copy them in my documents folder but there doesn't seem to be a paste method once you select the Dropbox folder
Am I missing something?
I think the app is otherwise perfect for my needs;)