How do I update the extension Question Label without deleting the extension first and losing all my customizations?

Hi!

I wanted to update my Question Labels 1.2 to 1.3, but it’s not possible as long, as the question-label directory still exists on the server. In order to install the update, I’d have to delete the extension first and lose all my settings / customizations, etc.

Could you point me in the right direction, how to do that, without deleting everything first?

Thank you!