The best way to move files out of iAnnotate PDF (v3) is to connect your device with v3 to a computer. The send to v4 feature is not consistently working well anymore and we are no longer updating v3.

Follow these steps to move files out of version 3.
1. Tap the files/folders you would like to move (so that a check appears in the circle)
2. Tap "actions" 
3. Tap "send to iTunes"
4. Connect your iPad/phone to the computer with a cable, like you would to sync the devices. 
5. From the computer: select the finder icon
6. Find your device on the left side and select it.
7. Select "files" then "iAnnotate PDF"
8. Select the files you wish to save (command or Ctrl to select multiple) and move by dragging them to the desired folder location.