URGENT - please, please HELP!!

Email Contact groups listing has disappeared from my windows live mail display.

I run a local community association for older and retired people.  I use Windows Live Mail, and my contact GROUPS (all the contacts are still there) have suddenly disappeared.  This happened only two days ago.  Some weeks ago I upgraded to Windows 10 and also bought a Nokia Lumia 630 mobile phone around that time (which I’m told uses Windows software as Microsoft has acquired the company).  Bizarrely, all my GROUP NAMES (not the contacts) have now suddenly appeared on the Nokia around the time they disappeared from WLM on my laptop.  They are completely useless there as I don’t use my phone for email!

I’m reasonably computer savvy and have read the recent MS threads relating to others who have suffered the same fate.  I notice that they were given advice on how to restore their contacts – which wasn’t their problem, nor is it mine!  I know how to do that, should that happen.

Please do help us!  I used the contact groups to mail all the members in our association (language groups, social groups of all types) and rely on the groups being there under Contacts in the LHS of the WLM window.  If new members join one of our groups then the list needs updating I can’t do that if the group lists aren’t there.  Obviously they still exist, or they wouldn’t have appeared on the Nokia.  URGENT – PLEASE HELP!