I've created my product description page with 3 default tabs, when i created this tab 1 was the default and help the product description, after upgrading tab 3 is now the default tab holding the related products, how do i change back to tab 1 showing by default?

Thanks

In 3.93, it was on line 297 if using something like Notepad++. But anyway, it was already ActiveTabIndex="1", so I changed it to ActiveTabIndex="0" and it worked!