Atom has stalled?

I just closed previous pages, and went to open a new one –– and nothing. Can’t make anything happen, except to show the menu bar. No command opens anything. I installed Atom a few days ago, and it’s been obedient till now.
I’ve shut down Atom and re-opened it, but nothing changes. I’ll restart my iMac, with fingers crossed, and hope that helps…
Does anyone have an idea what to do here?

Oops. So I restarted the system, and everything seems okay. Sorry to bother you!