Example of display problem you may encounter:

You have certainly changed the font size under windows.
Stop ARRM, Go to 'Settings', 'System', 'Display', and put '100% (recommended)' in 'Scaling and Layout'.
Note: If before these manipulations ARRM is not stopped, the change will not apply to the program.

You can also, to change the settings only for the application, do

• Right click on the ARRM app
• Property
• Compatibility
• Click on 'Change high DPI settings
• Check 'Override high DPI scaling behavior' and select 'System' from the drop-down menu
• Click OK

Thanks to Titruf for this solution