Software support and security certificates are coming to an end for Victorinox's line of secure USB drives, but the firm announced on Facebook that it's offering customers full refunds until December 31 if they'd like to return their products in light of the developments. In order to avoid losing data, owners of the flash drives should perform a backup before the encryption application meets its untimely end on September 15th. However, files stored on non-encrypted areas of the device will remain accessible without further action. The Slim, Secure and Presentation Master storage sticks can still be used as run-of-the-mill thumb drives after the cut-off date, but the Swiss Army Knife maker's application will no longer be able to scramble or unscramble their contents.