Lightroom 6.0 Won't Open

So, a bit that I keep on hand to post relating to preference file reset

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Sounds like a canadate for resetting the preference file. Resetting the preference file is Adobe speak for deleating the preference file and then letting Lightroom Classic to recreate it.

The preference file can get corrupted, resulting in odd behavior. Some people have a knee jerk reaction in thinking they need to uninstall then reinstall Lightroom Classic, maybe that could be called for, but it would be better to first reset the preference file.

Be aware that resetting the preference file will result in Lightroom Classic creating a new catalog instead if opening your previously opened catalog (normally) so make sure you know where your catalog is. 

Be aware the resetting the preference file will revert some settings in Preferences to defaults. So be aware of what you have changed, so that you can put those back the way you want them.

some links:

https://lightroomers.com/replacing-the-lightroom-preference-file/745/

https://www.youtube.com/watch?v=bARt-hoCc2Q

https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html

https://helpx.adobe.com/lightroom-classic/kb/recover-catalog-images-resetting-lightroom.html

It spins, but does it eventually just close?

And is the catalog locked? see: https://helpx.adobe.com/lightroom-classic/kb/lightroom-error-catalog-cannot-be-opened-lrcat-lock.html

Hi there,

We are sorry about the experience due to Lightroom 6 not launching. Please share the operating of the computer on which you are facing this issue. Did your computers operating system go through an update recently?

You can try to reset the preferences of Lightroom using the steps mentioned here: https://helpx.adobe.com/lightroom-classic/help/setting-preferences-lightroom.html

Let us know if that helps!

Regards,

Nikunj