Incorrectly excluded a threat

Background:  A full system scan just concluded on my system and identified several tracking cookies (suggested to delete) and one item (PUA.Gen.3) suggested to excluded --optionally I could have chosen delete, but left it at exclude.

After NS completed deleting the cookies and excluding the PUA, I decided to investigate further and found that it was part of a setup routine for a downloaded program that I never installed.  I have subsequently deleted the never used downloaded program files.  My concern now is that if, in the future, I download that program again or any other program with the PUA and decide to install it, will NS continue (forever) to exclude/ignore PUA.Gen.3.

The program with the suspect file was downloaded about 2 years ago, but was only now just detected by NS this morning.

Question:  How can I remove the 'excluded' classification for PUA.Gen.3?

Win 7 Pro SP1     NS 22.7.1.32