Start SimHub.
Select Dashstudio on the left.
Go to the dashboard you use to play (ETS2 Dashboard Green or ATS Dashboard Green), on the right there are the items AUTO and MORE.
A click on MORE and in the menu that opens select EDIT DASHBOARD, you will see the dashboard in edit mode.
Now on the top right, it reaches the SPEED WARNING level, expand it by clicking on the arrow immediately on the left.
Once you have expanded, click on the LIMIT WARNING (Text) entry.
In the functions menu at the bottom of the screen, locate the item EFFECTS and remove the check mark from the item BLINKENABLED.
File menu and then Save.
