Cannot open saved project from local computer

I used Knime for the first time a few weeks ago and had a project open and (I thought) saved on my local computer; a folder for the project is there but it appears to be empty, or not accessible. An unexpected forced restart from Microsoft (presumably update) wiped out the open project. I can recreate it, but I don’t understand how there can be a local folder if in fact the project was not saved. Can someone enlighten? Or, how can it be opened? Is it possible I did everything on the hub, without realizing? If so, my email address was not recognized even though I did get several emails after I initially downloaded it. Any thoughts? Thank you!