Ah guessed so

I will update the add-ons soon. Some will no longer work ( like in your case

)
Yep, unfortunately the install script only puts in the templates into the default style set.
For a quick fix to install just the templates on all the other style sets as well, perform the following:
In the install_vbarticles.php file,
Find:
PHP Code:
$styleid = $vboptions['styleid'];
at around line 642 of install_vbarticles.php
replace it with
where X is the styleid of the Style in which you have (non default).
Now go to this url in your browser:
http://www.yoursite.com/forum/adminc...english&step=7
It will then put in the templates into the other non default style set.
You have to repeat this for every style you have ( which is non default ).