After Update, Can't Open Old Projects

I just installed the update and I can’t open any projects created before the update.

They’re in a dropbox folder, so not where the update was installed.

I have tried the following:

Opening from taskbar gets me the new project window. I can create a new project but cannot open ol ones.

I go to the project itself and try to open that but it gives me the new project window and doesn’t let me open the project.

I try to open from within a new project and nothing.

I try to import from within a new project and nothing.

In all cases, I get no error messages, it just sits there looking at me like I stole its last twinkie.