Question, where is it stored locally and how you you delete a sandbox? I've made a couple while playing around with it and I can't figure out how to delete them. I though you might need to delete the actual file but I can't figure out where it is.
Data is stored in your operating system user's data folder.On Linux:
$HOME/.local/share/hexroll3
On Windows:
C:\Users\[USER]\AppData\Roaming\hexroll3
On MacOS:
$HOME/Library/Application Support/hexroll3