The GUI is showing that prompt because it cannot find any valid board setting in the part.
The prompt will provide two option, either to load a board settings file (*.55s) and after that you will be able to use all the features of the GUI, or only access the command access mode, which will only give you access to the registers.
In your case you are not able to see the two option due to scaling of the display.
If you are using Windows 10, you can fix it by going to:
Windows Settings -> System -> Change Scaling to 100%.
Reboot the computer, for the change to go into effect.
After rebooting, if you launch the GUI you should be able to see the two options: "Load Board Settings" and "Command Access Mode".
Ture, its related with display scale.