OK - I just downloaded the hotfix and have read the instructions so I shall answer my own question in case anybody out there is confused by what has just happened like I was.

Point 16 says
16. After fully synchronizing hover your mouse over the green check mark in the lower right corner of the wallet and note the block number. Now compare that number to the official block explorer and make sure they match. The block explorer is HERE (https://roi-coin-blockexplorer.roi-coin.com/)

My comments - my little tick was not green - it is black - perhaps that shows it is out of sync?

I still think this should be the first line on the hotfix download page to aid people in checking without having to read through the forum threads or download the hotfix first.