Well guys, with much apprehension and concern, I followed the tip of uploading TV Reporter from geniatech (thanks ACS)
https://www.geniatech.eu/de/download/eyetv-reporter-64-bit/
Then uploaded Sentinel. https://www.macupdate.com/app/mac/64643/sentinel
I did not do a fresh install of MacOS 15.4 left it well alone.
Used TV reporter to uninstall EYETV 4. this took a little while but all links etc removed.
Then I opened EYETV 4.0.0 (8528) dmg to place it into Applications.
Then I opened Sentinel and unlocked (orange) the lock icon then dragged EYETV 64 into self-sign the app.
Then I locked the locked the lock icon (green)
Then I started Eye TV 64 bit and reinstalled it and tuned in the TV terrestrial TV stations.
And all so far is working well, able to change channels etc and no freezing etc.
Thanks to members for their input and advice, hope my input will help as well.
Cheers All.