HELP! Have just downloaded EM Client upgrade and all files, messages, folders etc have disappeared.

HELP! Have just downloaded EM Client upgrade and all files, messages, folders, contacts etc have disappeared. Opening EMC now treats me as a new client! I need these for work now!

Hello Melanie,
sounds like you accidentally skipped your data migration.
Please import them using Menu>File>Import>Import from eM Client 6 option.

Regards,
Olivia