There pretty much is no option to add any addon to Cloned Crobat. What I've found atleast and I just created the Metal Helmet addon to give it to my Cloned Crobat ;/.
I did some fast research on this and pretty much found this.
#1 Try to update your graphics card driver.
#2 Try to uninstall completly and reinstall from another source (There are 2 sources here http://www.padventures.org/index.php/p/v/downloads).
I'm not sure if this works. But it's always...
I think he means this.
If i use the command "!afk" it says i am afk. But if someone pushes me, the "!afk" command will go to it's end and say that you are back even tough you're not.