When you double click ARW files on computer, the associated program will be launched to open the selected ARW file. But you can change it to any program at your pleasure.
a) Select a program to open ARW files on Windows
Right-click on the ARW file and go through 'Open with' > 'Choose default program'. In the pop-up windows, choose a program as the ARW file opener. If you decide to always open ARW files with the program, only check the option 'Always use the selected program to open this kind of file'.

b) Select another application to open ARW files on Mac
First Get Info about any one of ARW files by right-clicking or Command-I, and click 'Open with' arrow to choose a program to start your ARW file. Click 'Change All' button to set the selected application as the default ARW file opener app.

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