Hello
In your modules mod_j51carousel.xml (../modules/mod_j51carousel/mod_j51carousel.xml - line181) replace the following...
<fieldset name="COLUMN_14">
<field name="j51_image14" type="editor" width="300" filter="raw" label="MOD_J51_COLUMNCONTENT" />
</fieldset>
With...
<fieldset name="COLUMN_14">
<field name="j51_image14" type="editor" width="300" filter="raw" label="MOD_J51_COLUMNCONTENT" />
</fieldset>
<fieldset name="COLUMN_15">
<field name="j51_image15" type="editor" width="300" filter="raw" label="MOD_J51_COLUMNCONTENT" />
</fieldset>
<fieldset name="COLUMN_16">
<field name="j51_image16" type="editor" width="300" filter="raw" label="MOD_J51_COLUMNCONTENT" />
</fieldset>
<fieldset name="COLUMN_17">
<field name="j51_image17" type="editor" width="300" filter="raw" label="MOD_J51_COLUMNCONTENT" />
</fieldset>
Then in your modules default.php (../modules/mod_j51carousel/tmpl/default.php - line44) replace the following...
$max_images = 15;
With...
$max_images = 18;
That should do it. Let me know how it works out!
CiarĂ¡n