Please post your support requests to the proper board. Moving from install to themes board, as this is a theme issue imo. To 'remove' that feature I suggest to just remove the slideshow button. Is it what you want? If so, copy the following code to your theme.php file:
/******************************************************************************
** Section <<<$template_img_navbar>>> - START
******************************************************************************/
// HTML template for the image navigation bar
$template_img_navbar = <<<EOT
<tr>
<td align="center" valign="middle" class="navmenu" width="48"><a href="{THUMB_TGT}" class="navmenu_pic" title="{THUMB_TITLE}"><img src="{LOCATION}images/navbar/thumbnails.png" align="middle" border="0" alt="{THUMB_TITLE}" /></a></td>
<!-- BEGIN pic_info_button -->
<!-- button will be added by displayimage.js -->
<td id="pic_info_button" align="center" valign="middle" class="navmenu" width="48"></td>
<!-- END pic_info_button -->
<!-- BEGIN slideshow_button -->
<!-- END slideshow_button -->
<td align="center" valign="middle" class="navmenu" width="100%">{PIC_POS}</td>
<!-- BEGIN report_file_button -->
<td align="center" valign="middle" class="navmenu" width="48"><a href="{REPORT_TGT}" class="navmenu_pic" title="{REPORT_TITLE}" rel="nofollow"><img src="{LOCATION}images/navbar/report.png" border="0" align="middle" alt="{REPORT_TITLE}" /></a></td>
<!-- END report_file_button -->
<!-- BEGIN ecard_button -->
<td align="center" valign="middle" class="navmenu" width="48"><a href="{ECARD_TGT}" class="navmenu_pic" title="{ECARD_TITLE}" rel="nofollow"><img src="{LOCATION}images/navbar/ecard.png" border="0" align="middle" alt="{ECARD_TITLE}" /></a></td>
<!-- END ecard_button -->
<!-- BEGIN nav_start -->
<td align="center" valign="middle" class="navmenu" width="48"><a href="{START_TGT}" class="navmenu_pic" title="{START_TITLE}"><img src="{LOCATION}images/navbar/{START_IMAGE}" border="0" align="middle" alt="{START_TITLE}" /></a></td>
<!-- END nav_start -->
<!-- BEGIN nav_prev -->
<td align="center" valign="middle" class="navmenu" width="48"><a href="{PREV_TGT}" class="navmenu_pic" title="{PREV_TITLE}"><img src="{LOCATION}images/navbar/{PREV_IMAGE}" border="0" align="middle" alt="{PREV_TITLE}" /></a></td>
<!-- END nav_prev -->
<!-- BEGIN nav_next -->
<td align="center" valign="middle" class="navmenu" width="48"><a href="{NEXT_TGT}" class="navmenu_pic" title="{NEXT_TITLE}"><img src="{LOCATION}images/navbar/{NEXT_IMAGE}" border="0" align="middle" alt="{NEXT_TITLE}" /></a></td>
<!-- END nav_next -->
<!-- BEGIN nav_end -->
<td align="center" valign="middle" class="navmenu" width="48"><a href="{END_TGT}" class="navmenu_pic" title="{END_TITLE}"><img src="{LOCATION}images/navbar/{END_IMAGE}" border="0" align="middle" alt="{END_TITLE}" /></a></td>
<!-- END nav_end -->
</tr>
EOT;
/******************************************************************************
** Section <<<$template_img_navbar>>> - END
******************************************************************************/