After installing the extension follow the below steps

1. Enable : Run script when product/category/brand/information item is added
2. Enable : Update New keyword to Preserved List **
3. Click on Save button
4. Click on the Preserve existing URL Keyword button **
5. Click on Clear Product URL keyword
6. Click on Clear Category URL keyword
7. Click on Clear Brand URL keyword
8. Click on Clear Information URL keyword
9. Click on Generate Product URL keyword
10. Click on Generate Category URL keyword
11. Click on Generate Brand URL keyword
12. Click on Generate Information URL keyword
13. Click on Set 301 Redirect **
14. Disable : Update New keyword to Preserved List **
15. Click on Save **

** Skip these steps if Broken Link Manager Extension is not installed

Generating Product SEO URL Keyword in batches

If your store has huge volume of products, then generating product SEO URL keyword by the above mentioned method may not complete successfully due to huge volume of products query execution. In such cases you can use this special option to generate product SEO URL keywords in batches.