@dimi: Experimental branch is way too outdated (last update was 5 years ago), so it's not supported. Most animations can be still exported via M_BaseBody_01 or F_BaseBody_01 meshes in stable branch. For some additional info about meshes you may check
this post as well.
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Due to their constant changes latest supported version would be the one from around 14 April (you can get it via depotdownloader if needed). Also because of this future updates will be provided once in 3 months or less often, if any.