For troubleshooting strange behavior, I need to reset the application's plist. How can I do so?
The application's preference list file (the plist) is a document updated on-the-fly with the current state of the application. Everything from window sizes to the current Next Capture Naming format is stored in the plist. It is named 'com.phaseone.captureone##' (for Capture One 12 and older versions) or 'com.captureone.captureone##' (for Capture One 20 and newer versions), where ## is the application version number. It resides in ~/Library/Preferences/.
To reset it to it's baseline, "vanilla" state, open Terminal (/Applications/Utilities/Terminal.app). You'll get a blank prompt:
Copy and paste the string starting with "defaults..." below depending on the version of Capture One you have. Then press Enter.
For Capture One 21
defaults delete com.captureone.captureone14
For Capture One 20
defaults delete com.captureone.captureone13
For Capture One 12 and older versions
defaults delete com.phaseone.captureone12
NOTE: Use the number that corresponds to your Capture One version instead of '12'.
There won't be a confirmation that it's completed, though if something goes wrong it will notify you. This will clear out the basic application cache and return Capture One to a “vanilla” state - all your custom settings, recipes, etc will remain, however, they will be reset back to the defaults. To re-enable them, simply choose them from the applicable menu.