Hey
@Aty! Starting by the end.
3.6 is being a little bit delayed by the inclusion of a lot of new features. These features are very powerful. I am working on smooth curves (adaptative keyframe interpolation) and then I'll work on a button to import an animation from Timeline. A feature already implemented is that, when receiving a message, the plugin finds the smallest path between the current state and the target state, and execute that path.
Now, since the wiki doesn't have an entry for the Messages yet, it is probably easy to get lost. You don't have to create a message for each source state. Rather, messages allow for an unlimited number of source states.
What are these source states? The source states are the states that don't ignore the message. In other words, the source states of a message are the states that receive that message and do something about it.
What do they do about it? They transition to the target state.
So, if you want to reproduce the effect of the "SwitchState" trigger, just add a message that has every state as a source, plus the given target.
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Now, from your description of the issues you are encountering, it seems you are using the 3.5 version which is released here in the hub. The version at github should save and load, and me and other people have been using it consistently throughout the last week. I personally have been saving and reloading animations a lot for the development.
Oh, I got it! Vars are a little complicated. They can't be modified as a rar file, and I have done that, which breaks the var. So the latest var at github is broken. I'll update the description here to warn people of that.
What you need to do is just extract the var. The plugin will be in Custom/Plugins/HaremLife/AnimationPoser.
Sorry about that.