@williamatics is it telling you that you are running an outdated version of the client?
That was an issue I had whenever I moved the client from my download folder to my desktop. It seems that it does not like being moved. If you are having this issue too, then just re download the client and leave it in the folder it was downloaded to and it will work again. I ended up just creating a shortcut to the client on my desktop. Must just be a stupid bug of sorts.
