Hello,
Your device at the moment uses custom Glomex firmware, that is why the firmware has a different numbering.
If you want to update the firmware to the official Teltonika, you can download the firmware files from here. You will probably not be able to update straight to RUT2_R_00.07.0 and above, thus try RUT2XX_R_00.01.14.6. Since both firmware versions are different, device will probably not pass 1.14.6 firmware validation and will require to install only a fresh copy of the firmware with the previous configuration reset to default values in order to prevent the device from bricking
Best regards,