1/ Main in portrait when using the app/device in landscape mode. 2/ The "share" function for "files" is broken. It only accesses internal memory device & not external memory (usb hard drives, exSD cards, etc). 3/ Customer support email (supplied @ Google Play) is useless & takes you to the "support" (sic) webpage. 4/ Support page won't load profile page from hamburger menu (needed to find the "host key". 5/ Host key not in Android app. No excuses from devs. accepted. 1 star until fixed.