The only thing I haven't yet done, that I can think of, is to reinstall - so I'm going to do that now. Completely remove current install from my system, redownload, once more, from the exact place I got it from (having already confirmed my username exists/has been added to the Dragon's Prophet game), just to see what happens.
I will try both logging in regularly, as well as copying and pasting from notepad, after the download and install is complete.
After that, I have nothing else I can think of to try myself; can only hope someone else knows more about what to do.