Normally, any program you have set to "Run as Administrator" will request that permission, regardless of whether or not it actually makes any changes. All DesignCAD is likely to do is change some registry settings that control its own operations; it won't do anything to affect Windows in general.

  • Run the Options/Options command. 
  • Activate the View tab.Check the box for "Use Large Icon".
  • Click OK.
  • This will make the icons for the toolbars larger. 

Short of changing Windows' DPI setting, there's no way to make the internal fonts (in DesignCAD's dialog boxes and other user interface areas) larger.