Please follow the steps below to make the Long Description(extendeddesc) tab open by default in shopexd.asp page.
1. Connect to your website via ftp
2. Open file product.js located in plugins\products folder. You may take backup of the file before making any changes.
3. Locate this code (around line 341):
$(document).ready(function(){
4. Directly BELOW it, please insert this new code:
$('#heading0').find('a').trigger('click')
5. Please check the website again after clearing browser cache. The preview of the page is given below.