Yup.. there is the firmware version 4.0 from smartdevices
http://www.smartdevices.com.cn/files/SmartQ7-v4.0.rar
from that link, we can find v3.0 but there isn't a v3.1.
maybe eletroworld were thinking the next version would be v3.1 but smartdevices naming convention jumps to v4.0 as the next public release.