On the right-hand side of the plugin’s customization dialog, you will see a button with an icon that looks like a red "X". Clicking this button will delete the highlighted Kindle serial number from the list. You will be prompted once to be sure that’s what you truly mean to do. Once gone, it’s permanently gone.
-Once done creating/deleting serial numbers, click Close to exit the customization dialogue. Your changes wil only be saved permanently when you click OK in the main configuration dialog.
+Once done creating/deleting serial numbers, click Close to exit the customization dialogue. Your changes will only be saved permanently when you click OK in the main configuration dialog.