Can I reuse my Unused H1b petition

Hi team, I have a question regarding unused h1b petition.
H1B Petition was approved in Nov 2014, but I was not able to travel to the US in H1B due to project being scraped. In one of the recent posts in Redbus2us , it was mentioned that unused H1B can be used even after 6yrs from date of petition approval.
Currently i reside in the US, in H4 visa. looking to see if I have any option to reuse my unused H1B petition.
Please let me know if this rule change is applicable to my case and if I can reuse my H1b petition.