Notes about the AR4W file extension:
To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened
" (Windows 7) or "How do you want to open this file?
" (Windows 10) if you double-click the file. There click on "More apps"
and choose a suitable software to view such files on your PC or from email attachments.
The AR4W file type is primarily associated with 'A Ruler For Windows' by Rob Latour. AR4W files are skins used with 'A Ruler For Windows', an on-screen measuring utility ideal for people working with computer graphics.
Detailed information for file extension AR4W:
Primary association: A Ruler For Windows
Company: Rob Latour
File classification: CAD/CAM
To change file associations press Windows Key
and then Apps and Features
> Default apps
> Choose default apps by file type
Invalid file associations could be the result of underlying issues within your Windows PC.