When you upgrade, especially, from one old version of the app to another old version, a lot of things may go wrong. In complex situation like this one, try to give us a clear description with as many details as possible. Otherwise, it is very difficult to troubleshoot. And that's why you got no replies in 4 days.
I would leave all those files alone, for now. When you get things sorted out – then you can think about deleting files. And remember to use backup for everything. That's what Time Machine is for.