Hi ​@charlotte 

Yes—you can unlink or reconfigure third-party connections through the Lucid Cards settings panel

To learn more - Lucid Cards Overview

Hope this helps - Happy to help further!!
Thank you very much and have a great one!
Warm regards

Hi ​@charlotte, thank you for posting in the community! Just to add to the information our Lucid Legend Huma shared above, I recommend checking this Integrate Lucid Cards with Smartsheet article from the Lucid Help Center. Specifically the Connect a different Smartsheet account section of that article. 

Please note that boards linked to a previous Smartsheet account will remain linked to the original Smartsheet but the sync will no longer work because the credentials are now authenticated with a different account.

I hope this helps! Please let me know if you have any questions. 

Thank you both -- unfortunately, when I click on the pencil icon of a SmartsheetCard, no gear icon appears in the Card Details. The same is true of the LucidCard. When I click on the pencil icon of a LucidCard, no gear icon appears in the Card Details panel. 

Hi ​@charlotte, thank you for following up and apologies for any confusion! The settings icon was updated and it’s currently the following icon instead. Would you mind giving this a try and let me know if you experience issues or if you have any questions? Thanks!