After shut down, starts new account again...

I just put on the free version yesterday and marvelled at a fine program, but this morning all the emails have disappeared and I have to start importing again. Have I missed pressing some button somewhere?

If you are referring to a Hotmail account, install the fixed version from here: http://www.emclient.com/dist/v5.0.177…
Otherwise, describe me the problem in more detail.