So looks like you are talking about the Secure Directory URL, correct?
While I am not 100 percent sure off the top of my head why a reset would not change the URL for you, I can provide with you an answer to your question about deleting ITL and or CTL files in bulk.
VoIP Integration make a product for exactly this.
https://www.voipintegration.com/Software/Bulk-CTL-Eraser/