If you have purchased recently, chances are that you have 2.2. Is this a DIY kit, or fully assembled? If it’s DIY, the instructions you followed indicate the version number. Note that both 2.1 and 2.2 use orange terminal block. Only 2.1 requires entering bootloader; for 2.2 you just plug in USB cable and flash firmware directly (there is no need to enter bootloader). Also, 2.2 does not require driver in Windows and Linux (except if you are in Windows XP or using MacOSX, for which the driver can be downloaded following the firmware upgrade instructions).