Your data is yours... get it out of the wiki software how you want
bLADE Wiki stores wiki pages in text files. If you look in a directory used for a wiki location, you can see your notes in .txt files.
So if you decide that you have had enough of bLADE Wiki and want to take your notes out, the files are there for you to do what you want with them. They are not wrapped in any proprietary junk or formats.
If you want to export notes into different formats, you have a few options:
Get the latest updates for bLADE Wiki from http://bladewiki.blogspot.com