Hi Michael,
Thank you for the details, I was able to replicate this issue on our local test servers, so this is a yet unknown bug. Luckily it is only a minor error, so it can be fixed via a simple file edit.
If you want, I can do that for you via FTP, or your can do it as well, just follow these steps:
1. Make sure to have a full site back-up just in case.
2. Open up the wp-content/plugins/ajax-search-pro/includes/views/asp.shortcode.general.php file via FTP file editor on your server
3. Change it’s contents to this
4. Save the file
The issue should be gone.