This was a great plugin, but no new development about a year

Nope. I had premium support. They were unresponsive in regards to updating what used to be a decent plugin.

I even sent some of the code changes to them, but no response.

I cannot say what their response would be if you get premium support. They may be fine for bug fixes, etc, but I don’t know about development questions.

I sent this to simple map with no response. 2 of the changes are extradinarily simple, and I even provided the code, but no changes were made. I got a reply that they claim to provide 4 updates a year, which hasn’t happened.

Three requested fixes.

1. Please make the map in the individual listing be more than 100 x 100 pixels. It’s also not ‘clickable’. The size and this makes it pretty useless to even display. [I actually did this to make it 400 x 400 ].
Change this line:

$return .= "<div class='sm-single-map'>[sm-location data='iframe-map' map_width='400px' map_height='400px']</div>";

in the file: simplemap/classes/templates.php

This may be where you can solve your issue.

2. Displaying the website link in simple map output is needed. It is data that you can input, but it never displays.

See: http://www.cyclingutah.com/bike-shop-directory/
and
http://www.cyclingutah.com/bike-shop/wasatch-touring/ for how this looks.

To do so, add 1 line (see below where it says ‘added by Dave’) to:

function get_template_structure() {

			// Grab the post that contains the template strucutre or the hard_coded structure
			if ( 0 != $this->template_id ) {
				// get post obejct via ID
				// return post_content
			} else {
                $return  = "<div class='sm-single-location-default-template'>";
                $return .= "<div class='sm-single-map'>[sm-location data='iframe-map' map_width='100px' map_height='100px']</div>";
				$return .= "<div class='sm-single-location-data'>[sm-location data='full-address']";
                $return .= "<a href="[sm-location data='directions']">Get Directions</a>";
                $return .= "<ul class='sm-single-location-data-ul'>[sm-location data='phone' before='
<li>' after='</li>
'] [sm-location data='email' before='
<li><a href="mailto:%self%">' after='</a></li>
'] [sm-location data='sm_category' format='csv' before='
<li>Categories: ' after='</li>
'] [sm-location data='sm_tag' format='csv' before='
<li>Tags: ' after='</li>
']";

/* added by Dave */
	$return .= "<a href="[sm-location data='url']">Visit Website</a>";
/* endadded by Dave */	

                $return .= "</div>";
                $return .= "<hr style='clear:both;' />";
                $return .= "</div>";
                $return .= "[sm-location data='description']";
                return apply_filters( 'sm-single-location-default-template', $return );

			}

			return $return;
		}

3. Make the outuput so it will be indexed/searched by Google. It is currently not.

[Please use the code buttons – as is, your code may have been corrupted]