Thank you. I realised what the problem was. I had logged in via another email when I had re-installed it. I've purchased another one but now it won't download!!!!
You can find all your purchased plugins on this page where you can re-download and install: https://www.playitsoftware.com/Account/Plugins
I purchased an Audio Processing plug in last week. I had to reinstall Play it Live due to issues with the music. I have clicked the reinstall on the email I received after the purchase and all I am getting is a grey screen. What do I need to do?