Thanks for the input. But I am still having trouble. My LuCi login page does not show a version number as you suggest. It shows only: Powered by LuCI Master (git-17.289.64212-462779c) / MTH Reboot 20180228-1146 r5096+4-a29848c671. So I'm not sure why I'm not seeing what you think I should be seing.
And the version 1.1 firmware link you provided appears to be for a WIU and not a DCS Explorer.