Documents2Go will allow you to WiFi transfer files from your iPad to a PC/Mac. If you don't already have the PC/Mac program loaded, you can get it here:
Download. Scroll to the bottom of the page for the download link.
If you've not ever sync'd your computer and the iPad up, you'll have to do that, but once you do, you'll be able to access the files in your Docs2Go.
I don't remember the steps for syncing and set-up, as I did it a while ago - but I know that on my Windows 7 PC, my Docs2Go has a file folder under the "My Documents" on my PC. I can go in there and add, remove, edit, etc. files. Very simple process, once the two are sync'd.
The good news is - you CAN get at that file. May take a bit of fiddling (the bad news) but you can do it.
Good luck.
Marilyn
P.S. And syncing the two doesn't mean like iTunes, where the data is erased. It's just where the two devices (computer and iPad) learn how to talk to each other...