I've released a new version right now; it offers enhanced log-infos for this issue.
Please download & install the new version from
https://fakinthefunk.netGo to the about box (Menu "?") and doubleklick the label "Keepin' it real"
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-> Set the loglevel to "debug"
Then try to unlock. It it fails, go back to the about box and doubleclick the version-number in the bottom-left corner to open the logfile in a texteditor.
Please e-mail the content of the last ~20 lines to "info <at> udse.de"