As far as I know, the procedure hasn't changed. I don't know about 8.5, though, as I hadn't tried it.

If you are trying to add a morphs to a rigged poser-intended figure, though, then it might be the case that there is no way to do it. What I founf is that the rigged poser content needs to have a pre-defined morph area, to which you would be able to add new morphs, before a morph target can be created. If the content didn't come with morph areas, there is no way to create a new morph area and add a target to it.

However, if you have something like V4, or any content item that already has morohing areas, then you can navigate to the morph area of interest (say, in V4 -> "head"), create a morph target there, then navigate to the area again from the menu of existing morphing areas and you will see your newly created target there. You can now select and edit it to create a new morph.

Does this help?