- updated with explanation by Jörg Sachse

README.md

 Plugin using MediaInfo to extract metadata from A/V files
 =========================================================
 
-compile
+Compile
 -------
 
 * make clean
 * make
 
-install
+Install
 -------
 
-* downgrade format library to version XXXXX
-* copy jar-file to /operational_shared/plugins/custom/
-* upgrade format library to version YYYYYY
+* if you had previous versions of the plugin installed, then do
+  * downgrade the Format Library to 7.1099 (which is the last version before the mapping was introduced according to the release page at https://github.com/rosetta-format-library/RosettaFormatLibrary/releases)
+  * delete all previous plugin versions. You might have to remove the Classification Group assignment from the list of extractors and modify format entries in the FL.
+* install the newly packed plugin JAR to "/operational_shared/plugins/bundled/"
+  *	NOTE: Do NOT install it TO "/operational_shared/plugins/custom/", because Rosetta will assume that it has to use the Local FL, where you then would have to create a manual mapping. And trust me, you REALLY don’t want to do that. 
+* Restart Rosetta (dps_restart)
+* upgrade the Format Library to the latest version (at lease 7.1100, latest 7.2106)
+* check that the plugin has been assigned correctly in the Extractors list (this should have happened automatically during plugin installation)
+* configure format “fmt/569” to have the plugin as its assigned MdExtractor in the Global Format Library
 
-configuration
+
+Configuration
 -------------
 
 * nothing needed, because mapping is part of current format library 
 
-copyright hints
+Copyright hints
 ---------------
 
 MediaInfo is released under Gnu General Public License 3.0 (or higher),
 therefore it could not be integrated and delivered as a binary only plugin.
+
+Thanks
+------
+
+Thanks to Jörg Sachse to figure this out.