So a friend of mine @kenami noticed that you were unable to open up a local roblox file (like off your desktop) and a published file from the site at the same time. For me, I just noticed this today, Kenami noticed this about 8 days ago.
When attempting to open both at once, the last file you had open (whether it was the local or the published file) will print “Shutting down” close, then the other file will open. Same vise versa.
Here’s a short gif of what’s happening: Screen capture - 38a7a38329e663f89f09ac8eb4bc4a93 - Gyazo
I hope this is not intentional, as now it’s very hard to import models and games from local files to a public place.