Example of display problem you may encounter:

• Stop ARRM
• In Windows 10, go to 'Settings', 'System', 'Display', and set '100% (recommended)' for 'Scale' in 'Scale and Layout'.
  
• In Windows 11, go to 'Display' (by right-clicking on the desktop), and set '100% (recommended)' for 'Scale' in 'Scale 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