[MrToasty]

Doesn't support prefixes in 3.7, but you can quickly change the following to make it work

Open template under "new posting templates >>" newthread

Find

$vbphrase[title]:<br />
<input type="text" class="bginput" name="subject" value="$subject" size="20" maxlength="85" style="width:100%"/><br />

Replace with

            <if condition="$prefix_options">
                $vbphrase[prefix]:<br />
                    <select name="prefixid" class="bginput">
                        <option value="">$vbphrase[no_prefix_meta]</option>
                        $prefix_options
                    </select><br />
                $vbphrase[title]:<br />
                <input type="text" class="bginput" name="subject" value="$subject" size="20" maxlength="85" style="width:100%"/><br />
            <else />
                $vbphrase[title]:<br />
                <input type="text" class="bginput" name="subject" value="$subject" size="20" maxlength="85" style="width:100%"/><br />
            </if>

Open template under "Threadbit templates >>" threadbit

Find

<div class="sticky">Sticky:

Replace with:

<div class="sticky">
            $thread[movedprefix]
            $thread[typeprefix]
            $thread[moderatedprefix]
            $thread[prefix_rich]

then

Find

<div class="thread$thread[statusicon]">

Add Below

            $thread[movedprefix]
            $thread[typeprefix]
            $thread[moderatedprefix]
            $thread[prefix_rich]

And then you're done and prefixes are enabled. I haven't included searching for prefixes as searching isn't really included in this style anyway...