You can change the DPI scaling on a per-app basis. Go to the program files folder of AIDA64, right-click on aida64.exe, select Properties and go to the tab Compatibility. Best is to change the option for all users by clicking on the button on the bottom first.
Click the button Change high DPI settings. At the Program DPI section, tick Use this setting to fix scaling problems..., and select I signed into Windows from the pulldown because it's a background application. And in the High DPI scaling override section tick the Override high DPI scaling behavior, and select Application from the pulldown. Click the OK button, click the Apply button and then the OK button (yes, sometimes there's a difference between those two in Windows). Then close AIDA64 and restart it.