Site lagging and getting "queue_limit_exceeded" with plugin activated

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<script type='text/javascript'>
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var pluploadL10n = {"queue_limit_exceeded":"You have attempted to queue too many files.","file_exceeds_size_limit":"%s exceeds the maximum upload size for this site.","zero_byte_file":"This file is empty. Please try another.","invalid_filetype":"This file type is not allowed. Please try another.","not_an_image":"This file is not an image. Please try another.","image_memory_exceeded":"Memory exceeded. Please try another smaller file.","image_dimensions_exceeded":"This is larger than the maximum size. Please try another.","default_error":"An error occurred in the upload. Please try again later.","missing_upload_url":"There was a configuration error. Please contact the server administrator.","upload_limit_exceeded":"You may only upload 1 file.","http_error":"HTTP error.","upload_failed":"Upload failed.","big_upload_failed":"Please try uploading this file with the %1$sbrowser uploader%2$s.","big_upload_queued":"%s exceeds the maximum upload size for the multi-file uploader when used in your browser.","io_error":"IO error.","security_error":"Security error.","file_cancelled":"File canceled.","upload_stopped":"Upload stopped.","dismiss":"Dismiss","crunching":"Crunching\u2026","deleted":"moved to the trash.","error_uploading":"\u201c%s\u201d has failed to upload."};
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<script type='text/javascript'>
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var wpuf_frontend = {"ajaxurl":"http:\/\/www.somesite.com\/wp-admin\/admin-ajax.php","error_message":"Please fix the errors to proceed","nonce":"b907588c3d"};
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<script type='text/javascript' src='http://www.somesite.com/wp-content/plugins/wp-user-frontend-pro/js/frontend-form.js?ver=3.5.1'></script>