[Plugin: Easy Nivo Slider] errors on debug mode

When I switch on debug mode wp-config I get many errors for this plugin. How can we address them? Thanks for your help.

Notice: Use of undefined constant EASY_NIVO_SLIDER_VERSION – assumed ‘EASY_NIVO_SLIDER_VERSION’ in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/easy-nivo-slider.php on line 27

Notice: Use of undefined constant EASY_NIVO_SLIDER_NIVO_VERSION – assumed ‘EASY_NIVO_SLIDER_NIVO_VERSION’ in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/easy-nivo-slider.php on line 28

Notice: Use of undefined constant EASY_NIVO_SLIDER_CUSTOM_IMAGE_SIZES_VERSION – assumed ‘EASY_NIVO_SLIDER_CUSTOM_IMAGE_SIZES_VERSION’ in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/easy-nivo-slider.php on line 29

Notice: Use of undefined constant EASY_NIVO_SLIDER_NEXTGEN_VERSION – assumed ‘EASY_NIVO_SLIDER_NEXTGEN_VERSION’ in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/easy-nivo-slider.php on line 30

Notice: Undefined offset: 60 in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/easy-nivo-slider.php on line 152

Notice: Undefined index: category in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/easy-nivo-slider.php on line 256

Notice: Undefined index: debug in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 169

Notice: Undefined index: debug in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 169

Notice: Undefined index: debug in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 169

Notice: Undefined index: first_linking in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 93

Notice: Undefined index: first_caption in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 95

Notice: Undefined index: pause_on_hover in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 102

Notice: Undefined index: arrows in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 103

Notice: Undefined index: hide_arrows in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 104

Notice: Undefined index: controls_buttons in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 105

Notice: Undefined index: controls_numbers in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 106

Notice: Undefined index: controls_thumbs in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 107

Notice: Undefined index: controls_offset in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 108

Notice: Undefined index: first_controls_offset in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 108

Notice: Undefined index: number in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 125

Notice: Undefined index: debug in /home/ourdirectory/public_html/wp-content/plugins/easy-nivo-slider/misc/functions.php on line 169

http://wordpress.org/extend/plugins/easy-nivo-slider/