# Won't open jpg files from explorer or outside Opus

**URL:** <https://resource.dopus.com/t/wont-open-jpg-files-from-explorer-or-outside-opus/29840>\
**Category:** Help & Support\
**Created:** [September 7, 2018, 11:27am UTC](https://resource.dopus.com/t/wont-open-jpg-files-from-explorer-or-outside-opus/29840 "2018-09-07T11:27:15Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Leo](https://resource.dopus.com/user_avatar/resource.dopus.com/leo/32/69732_2.png) [@Leo](https://resource.dopus.com/u/Leo)\
**Post date:** [September 7, 2018, 11:31am UTC](https://resource.dopus.com/t/wont-open-jpg-files-from-explorer-or-outside-opus/29840/2 "2018-09-07T11:31:58Z")

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> [@hoggy422](#):
>
> I've tried setting the default filetypes to use 'dopus helper application', but they still refuse to open in the DO viewer.

That's `DOpusRT.exe`. You want `d8viewer.exe` if you want an exe that will open things in the Opus viewer. (Technically, you can use DOpusRT.exe as well but it requires extra arguments.)

> [@hoggy422](#):
>
> Double-clicking jpg files within Opus already does use the internal viewer. It's only trying to open them outside of DO, that is the problem - like from Explorer or the file-picker dialogs.

See this FAQ:

> [@How to use the Opus image viewer inside or outside of Opus](https://resource.dopus.com/t/how-to-use-the-opus-image-viewer-inside-or-outside-of-opus/1326):
>
> See Also: [How to stop the Opus image viewer from being used by default](https://resource.dopus.com/t/how-to-stop-the-opus-image-viewer-from-being-used-by-default/1366) to do the opposite to this FAQ. Inside of Opus If you're a fan of the image viewer that's built into Directory Opus then it's trivial to make Opus use the viewer when you double-…

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