Hey @Jarek, apologies for this, that’s frustrating.
I can confirm I am seeing the same behavior on my end.
I’m hoping to phase out the old editor for this new one and so I will add save as functionality for png to it.
I’ve added a YouTrack, I’ll aim for the next release of Rhino (8.10). SVG Editors cannot save to PNG : RH-82532 (myjetbrains.com)
– cs