I have been using this MOD for many versions now. The latest is 3.6.8 PL1
Unfortunately, it does not seem to work. There is no option to mange prefix's under the forum tools drop down and... no prefixes in the newthread function.
...
update
I found an area in SHOWTHREAD that is easy to miss with certain themes(styles)
For anyone missing the "Manage Thread Prefixes" under the Forum Tools drop down menu, carefully look over the following template edit. In my own case, it was placed in the wrong location thus causing it to appear as not working.
Code:
<if condition="$foruminfo['allowprefix']">
<div><label for="fa_cat"><input type="radio" name="do" id="fa_cat" value="manageprefix" />$vbphrase[manage_threadprefix]</label></div>
</if>
To confirm the obvious, this MOD works(tested) with 3.6.8 PL1