The black border should be be there the white should be all the way tot he edge. It’s like the app suddenly applied a border on the viewport and shrunk everything.
My guess is not optimized or not optimized for your OS. Plus there may be an extra layer to make it compatible that may be resource hungry. That being said, I’ve seen my fair share of resource hungry paid and closed apps too.
I like Avelon but the price is a bit steep for a brand new app and it’s really nerfed in the free version. I paid for a couple of months but right now I’m making it work with Voyager.
Not quite in the usable temp for engineering yet but definitely on the right path. And a wee bit less sketchy than the last one. That combine with the progress is fusion reactors. We have a bright future in energy ahead of us (but pretty grim everywhere else)
Sets up “ads” on their screen. Complains.