Upgrade to B-Folders 5 Desktop Edition

License key verification

To continue, you must provide your license key (activation key, code) for B-Folders 2, B-Folders 3 or B-Folders 4. Make sure you copy the whole key, including the 2-, 3- or 4- prefix.

NOTE: Microsoft Outlook often corrupts the keys in emails with default settings, so if your key does not work, you will need to clear  the Tools > Options > Preferences > E-mail Options > Remove extra line breaks in plain text messages checkbox.