The + icon that is on the property unit can be removed/changed by eding the file templates/property_unit.php

The plus icon is in the span element with”listing-cover-plus” css class. The code is around line 169
print '<div class="listing-cover"></div><a href="'.$link.'"> <span class="listing-cover-plus">+</span></a>';

 

for the featured property widget the icon is in widgets/featured_property.php at line 62

<a href="'.$link.'"> <span class="listing-cover-plus">+</span></a>

for the latest listing widgets the icon is in widgets/footer_latest_widget.php ar line 403

and it can be also found in the following files (use ctr+f in your editor to find the exact line)

agent_unit.php

agen_unit_featured.php

agent_unit_widget.php

blog_unit2.php

blog_unit.php

places_unit.php

related_post_unit.php

and shortcodes.php