Hi bshamblen,
Please follow steps:
1. Open file "CuteSoft_Client\CuteEditor\Dialogs\InsertImage.aspx"
2. You can find the following line:
<img id="img_AutoThumbnail" src="../Load.ashx?type=image&file=resize.gif" onclick="AutoThumbnail();" title="[[AutoThumbnail]]" class="cursor dialogButton" />
3. Update it to
<img style="display:none" id="img_AutoThumbnail" src="../Load.ashx?type=image&file=resize.gif" onclick="AutoThumbnail();" title="[[AutoThumbnail]]" class="cursor dialogButton" />
4. test it again
Thanks for asking