Thanks for answering, and confirming I am not alone in this issue. The Adobe article says I need my serial number? As a CC subscriber, I do not have a serial number. However I did already de-install Lr, re-boot and then re-install from the Adobe web site for CC Lr 6.
Isn't 2015.10 the bought/standalone version of Lr? I think that I need 6.8 or something? I saw Can't update to latest version of Lightroom CC which seems up my street, but I cannot seem to do the install of the newest version. The feature set changed a lot since my old version..
Anything else I should try?
I found the fix: I uninstalled or repaired CC app (not sure whether it was uninstalled, but it seemed to be). This uninstalled my Lr, Ps and Br.
After the CC app was set up again, I was able to reinstall Lr, Ps and Br and they all seemed to be correct versions now. Hopefully they will also be updated when needed...
Strange behaviour from the CC app, but still this is fixed now, and the fresh installs use the old preferences, so I could continue on from where I left off... I hope that this can also help others with this issue.
Since you have a Creative Cloud subscription, you should have the CC version - the latest is 2015.10.
Lightroom 6 is the standalone version (with fewer features), but the installer (base installer and updates) are identical for LR 6 and LR CC. When you sign in with a serial number, you get LR 6, when you sign in with your Adobe ID, you get LR CC.
If you go to Help > System info in LR, what does it say?
When you do a reinstall, the base version (2015.0) is installed, and you need to update it to the latest version.
Here's a direct link to the 2015.10 update, which must be installed manually after downloading and unzipping.
Thanks Per for your help. My Lr version is now Lightroom version: CC 2015.10 [ 1111918 ] and all the features I expected are now there. (I am quite new to Lr, but an old Ps hand)! I did not need to do any further updates, as, when I installed from the CC app, all the updated versions (Ps, Lr and Br) were installed first time. Great, I am now set up...