I do not want to use Data Connector at all. It appears every time when I import data into Origin. I use the same worksheet multiple times for different data. Data Connector is what makes my work with datasheets much more complicated than before. I just want to turn it OFF by default and not see it in any Origin files I use.
In the latest version we just released, Origin 2026b, the Preferences->Options dialog has a control on the Miscellaneous tab that you can use to set the desired behavior for data connector after the data comes into the worksheet.