Folders not synchronising until selected v9

Using IMAP emClient v9 and I have noticed that folders can get way out of date, until you actually click on the folder and then it synchronises. This is a critical issue, especially if you have different email accounts and folders, maybe sorted at the server.

I read other people having this problem, and the Solution provided was to click the download for offline use. But that just turns the wheel continually and cycles through all your folders for ever.

In my Settings, General, I have Synchronise items at startup. This is when it should synchronise all folders.

If not, when should it synchronise all folders without having to click and select every single folder all the time.