All effects with a custom XML GUI need to be blacklisted.
==========
+==========
+Effects can be assigned to an effect category in kdenlive/data/kdenliveeffectscategory.rc.
+==========
+
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Kdenlive parses the effect folder at each startup, so that if you have an XML file describing a new effect,
just copy it to your ~/.kde/share/apps/kdenlive/effects/ folder and restart Kdenlive to enable the new effect.