Thank you for your inquiry. We regret to inform you that there is currently no way to set the "Show tab bar" option to be unchecked by default when opening Excel. We apologize for any inconvenience this may cause.
However, we are constantly working to improve our products and address customer feedback. We appreciate your suggestion and will take it into consideration for future versions of our software.
If you have any other questions or concerns, please feel free to let us know. We are here to assist you.