Why the message cannot be seen on the screen

I did not sign up for the Pro pricing of the eM Client. One day after the offer cease, I would not read previous messages that were on the eM Client. The picture of the screen is below. Appreciatre if someone could help

Have you tried after installing the latest update released yesterday?

Oh, no I have not. Will try that.

When to check the updates, and found none. Any idea where I will be able to download the updates. Thanks

HI Lawrence, thanks.
Just got panic when I saw the body of the email missing and then after the updates, two years of messages when missing.

The I realised that it is slowing being updated. Thanks