First thanks for this great plugin. I recently got back to using WordPress after a little hiatus and I discovered your plugin. Nice job. The problem I have is that it worked for about a week then I updated WP. I have run into an issue with the plugin suddenly.
The widgets.php right column disappeared completely and the error on the page is...
<b>Fatal error</b>: Call to undefined function catalyst_get_image_sizes() in <b>xxxxxx/my-domain/wp-content/plugins/catalyst-excerpts-plus/catalyst-excerpts-plus.php</b> on line <b>721</b>
Disabled the plugin for now until I can look into it, but I thought I'd mention it.