If you're unable to access the DAKboard settings over the network, you can use a USB keyboard/mouse to access the settings directly on the DAKboard device itself. Here's how:
Plug a USB keyboard and mouse into the USB ports found on the device.
On the keyboard, press Ctrl+Shift+T (or Alt+F4 if the prior doesn't work). This will quit out of the DAKboard app. You can also use the Windows, CTRL, or Command keys (depending on the keyboard) to bring up the menu.
Use the mouse to click on the raspberry icon in the upper left or the Menu if it has appeared. Then select Help > Device Configuration.
This will bring up the settings page. Use the mouse, or keyboard Tab key to navigate between the fields and make the desired changes.
When complete, click the "Save changes" button at the bottom to apply any changes. Then reboot the DAKboard to bring your display back up. You can do this by bringing up the Menu again with the steps above, selecting Logout at the bottom of the Menu, then choosing reboot, or by unplugging and plugging the DAKboard from its power source.