QB Variable Save and Keep Working Button - Unsupported and Deprecated

That's pretty much the story for anything that isn't native. If you ask them about any of that they give a similar response because it's a use at your own risk kind of thing. They will not support it at all. 

I'm not sure what their plan is but if the button still exists then you should be able to use it in some way. They might be removing that button entirely, only they know, but I doubt that.