I had that same problem with the missing charms bar options (Windows RT). So I uninstalled, then re-installed, and they all appeared. Then I ran the sync, and it crashed. After that, no charms again. Honestly, I've never gotten Evernote to sync reliably on my RT tablet, which is pretty bad because if it syncs while editing a note, any work to that point goes bye-bye.
Mine seems to have good and bad days - often crashes when launching from the home screen, but not always. Once in EN, sometimes it crashes in the middle of a note and loses the data that was in the note (the unpardonable sin for an app like EN). After that, the note exists, but no data inside, which suggests it was syncing, and on future attempts the crashing is during sync. Rebooting doesn't help.