What's the difference between "skip it" and "choose sth else" in main-menu?

["Carlos Z.F. Liu" <carlos_liu@yahoo.com>]

When I updated the main-menu's translation, I was quite confused by
the original phrase.

After an installation step failed, you suggest users to run it again
from the menu, or skip it, or choose something else. Do all three
operations happen in the menu? Is there a button for skipping the
particular step? If all in menu, what's the difference between "skip it"
and "choose something else"?

Thanks.

-- 
 Best Regards,
 Carlos