[Plugin: Global Post Password] Any way to log out?

Whenever i try to click on links in all the post (which say “To download this design, go to it’s password protected download page and log in”), 404 error is displayed.

And normally, for the first time a user should see a page where he can enter a global post password, to access all global-post-password protected pages. After entering that password, he should be able to browse all protected pages, until his session expires. I’ve used the “Global-Post-Password” plugin for setting this up.