My WLM on Windows 7 will not open due to an error.

Tried system restore but did not help.

Tried uninstalling using wlarp.exe and reinstalling with Windows Live Installer but no joy.

My backup files are well out of date.

So thought to export contact list to Yahoo mail but where is it?

Last option is to change to Windows 10 but will it find  them?

Any advise please

Keith