Lightroom Classic wont launch

[Nat Dawn36114402gaok]

My lightroom classic will not launch, I've tried pretty much everything I can think of and nothing will work. Everything else will open perfectly fine, but Lightroom Classic. This issue started yesterday and I've been trying everything since to get it to work, I have no clue what else to try. Please HELP.

[AxelMatt]

If LR crashes or couldn't shut down regulary a .lock file remains in the folder where the catalog is located.

This .lock file must be deleted manually to start LR again.

More informations about this, you'll find here: 

The Lightroom catalog cannot be opened because another application already has it opened - lrcat.loc...

If there's no lock file try to reset the preferences to the default settings.

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

It's recommended to backup your preferences before you reset the preferences to the default settings: 

https://helpx.adobe.com/lightroom-classic/kb/preference-file-and-other-file-locations.html

If this doesn't help we need more informations about your system.

Please tell us

• Your operating system
• Exact version of Lightroom. 
• Do you get an error message?