Moon+ Reader wouldn't update info in file

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http://www.mobileread.com – Hi there! I have set up wireless syncing thorough Calibre (PC) --> Calibre Companion (Android). Then I import books in Moon+ Reader. The problem is, that when in Moon+ Reader I go to "My Shelf" --> menu --> "Edit book information" and then I edit the Tags there (for example), I would like it to be updated on my PC too. However, after editing in Moon+ Reader, my Calibre Companion doesn't see the update in the file (when I look information, Tag section) and apparently wouldn't sync changes with my PC. How can I fix this? Where is the problem? Looks like Moon+ Rea (HowTos)