Orientation lock removed?

Used this app for years, now the "Orientation Lock" setting is gone? Every time the phone accidentally goes portrait, it freezes for 20 seconds on a big book, then 20s to go back. Its always been annoying that this setting reset every time the app reloaded, but now its just gone? Searching for a new ebook app now.

lxKillFacexl about Bluefire Reader, v2.5