I don't know how this happens (though I suspect it's related to crashing or having to quit / restart and interrupt an upload) but quite often I find F360 complaining that there is a newer version than the one I'm working on which is extremely disconcerting and leaves me with the fear that I'm losing changes (either because I'm working on something that is old, or I've made changes that I'll have to lose since the «newer» version).