htaccess on calendar help set up please

Hi – hope someone can help me. I have My Calendar by Joe Dolson in full use on my web site. I am finding that Google will search a name and find a calendar event but when opening the link it opens an out of date calendar page – not even showing the name in the calendar but out of date completely. I have contacted Joe for help and he suggests that I use htaccess to direct all these searches to open in a particular link. How on earth do I do that – I have absolutely no idea – i did recently I think (?) clear the SEO settings on the calendar page to prevent searches but obviously that’s not right – and somewhere I found a little box that mcevents and I unticked that too – butIm going to go back now and see if I can find that one – does anyone have enough patience to help me please? https://www.beaconoflightenfield.co.uk child theme Third Style. Thank you