Just like some of you guys, I also used this tool a LOT to turn effects into props to pose things such as SFM models and other stuff, So you can already imagine how heartbroken I was when I discovered that that function was removed after 6 months of absence from steam due to school. Thankfully, I managed to find a workaround for those who find themselves with the same problem as me. Here is how you do it:

1. Subscribe to the Animate prop tool (https://steamcommunity.com/sharedfiles/filedetails/?id=120629004) and Easy Bodygroup Tool (https://steamcommunity.com/sharedfiles/filedetails/?id=104604943)

2. Right click the effect with the Animated Prop Tool and Left click it Elsewhere to create a Animatable prop version of the effect, turning it into a kind pseudo prop, that can be posed and is dupe-friendly. This Animated prop works just like a regular dynamic prop that this addon used to create, the only thing it lacks is bodygroup switching, and this is were the easy bodygroup tool steps in:

3. Right click the animated prop with the Easy bodygroup tool, and use the context menu to edit to edit the bodygropus of the model. And well, this is how you do it! Its not as easy to do, but while there isn't something official that does it, this method works mighty fine!

TL;DR: Right click effect with Animated prop tool, Right click to create a prop of it somewhere else, and use Easy Bodygroup tool to edit its bodygroups.

I hope this little method of mine can help you guys ;-)