Here you go. YOu can see that "fanart" and "poster" are empty. If I want to assign the pics from "choose poster" or "choose fanart" the paths are not updated:
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<!-- created on 2016-06-21 21:56:54 - tinyMediaManager 2.8.1 -->
<movie>
<title>300: Rise of an Empire</title>
<originaltitle>300: Rise of an Empire</originaltitle>
<set>300 Collection</set>
<sorttitle>300 Collection02</sorttitle>
<rating>6.1</rating>
<year>2014</year>
<top250></top250>
<votes>1461</votes>
<outline>Based on Frank Miller's latest graphic novel Xerxes and told in the breathtaking visual style of the blockbuster "300," this new chapter of the epic saga takes the action to a fresh battlefield--on the...</outline>
<plot>Based on Frank Miller's latest graphic novel Xerxes and told in the breathtaking visual style of the blockbuster "300," this new chapter of the epic saga takes the action to a fresh battlefield--on the sea--as Greek general Themistokles attempts to unite all of Greece by leading the charge that will change the course of the war. "300: Rise of an Empire" pits Themistokles against the massive invading Persian forces led by mortal-turned-god Xerxes and Artemesia, the vengeful commander of the Persian navy.</plot>
<tagline>Seize your glory!</tagline>
<runtime>102</runtime>
<thumb></thumb>
<fanart></fanart>
<mpaa>FSK 18</mpaa>
<certification>FSK 18</certification>
<id>tt1253863</id>
<ids>
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<key>tmdb</key>
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</entry>
<entry>
<key>imdb</key>
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<key>tmdbSet</key>
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</ids>
<tmdbId>53182</tmdbId>
<trailer>plugin://plugin.video.youtube/?action=play_video&videoid=7rMtt0s-tBM&fmt=37</trailer>
<country>US</country>