*Perhaps Litestep could monitor whether it exited properly the last time it was executed. If not, on next start it could ask the user whether they would like to switch to the default theme (and maybe give the option to select another theme).*

it shouldnt do that because litestep doesnt manage the themes, it loads the step.rc. if there's an include to a theme.rc doesnt matter, many still use litestep build without installer.

the second idea has it's downside too, because why would it prompt to change the theme, if litestep closed unexpectedly it should prompt if it should be run again (or reload witout asking).