Two versions of Illustrator and Photoshop

Hi, My mac did an OS update on 15/10/23.... somehow i now have a 2023 version and 2024 version of illustrator and photoshop on my mac... and neither are working properly!  It's taken me a few weeks to realise something weird was going on as i have two AI icons on the menu bar and files are not appearing in 'recent'.  A complete pain and most tools are greyed out and the search facility doesnt work properly either.  

Which one should i delete?  And if i delete one version will it mess up any of my ai files?

Cheers Jo