Norton Utilities - reinstall product

I run Norton Utilities along with Norton 360 with 277 days of subscription left to run

When I open Norton Utilities or when the scheduled maintenance opens I'm getting an alert as follows -
'Core product file(s) have been modified. Please run Smart update or reinstall the product.'
I have run Smart update several times and this has not fixed the issue. Please advise me how to reinstall the product

I take it you are using Norton Utilities 16?  This issue was reported back in December 2019. Norton has ignored all posts about this. See this thread    https://community.norton.com/en/forums/yearly-issue-norton-utilities-16-core-product-files-have-been-modified

We keep trying, but many feel Norton has abandoned this program in favour of the new subscription based Norton Utilities Premium.