Creative Cloud can't see my Lightroom Classic Installation

I have been happily using Adobe Creative Cloud and Lightroom Classsic for years to support my journalism sideline and photography endeavours.

My main editing machine is a powerful Windows desktop gaming PC running Windows 10, Intel 13700K and AMD 6800XT graphics using a variety of very fast drives.  I have had no problems for years but I've just fired up Lightroom Classic and had a warning that it needs to update to continue syncing with the cloud. That takes me to another page which then says my Lightroom is up to date. To be honest I don't really care about the syncing with the cloud so I thought little of it and started editing some pics I need for my next article.

Lightroom classic began crashing repeatedly to desktop and just closing down when I use the healing brush. I then checked which version I am on and it's the v12.3 release. I thought it would be worth upgrading so I went to Adobe Creative Cloud which shows v14 is the latest available. It says I can install that but it's not showing as an upgrade, just a fresh install. IN short I don't think Creative Cloud recognises my existing installation.

I am very worried that if I go ahead and install v 14 it could wreck my existing photo library, my catalogue etc.

I could really do with some help. Lightroom is basically unusable as it keeps crashing and I have pics for publication to edit.

Many thanks, Birdseed007