I mentioned in my previous post that I thought it might be a problem caused by installing a different version of a library, well, that was it. The MySql Connector library to be exact.
Looks like a change was made 8 days ago. This is the only change listed on GitHub. It looks like lines 39 and 40 were added. I have no idea how or why it has caused the problem, but I think I can rest easy knowing that this is definitely the cause.