[Plugin: Broken Link Checker] Website suspended after using the plugin

I got my website suspended yesterday after using this plugin. My site has several thousand posts and the plugin ran for several hours. It seems to access /wp-admin/admin-ajax.php too much, essentially causing a kind of ddos attack on the web server. I received the following email from my hosting provider:

————-

We recently noticed a very large CPU spike coming from your account, upon further investigation it appears that the bulk of this spike was mainly caused by one IP address accessing your site. As such we have blocked this IP address in your [.htaccess] to prevent your account’s CPU usage to continue to rise.

Here is the info that we were seeing:

# of requests — IP address

5,326 — XX.XXX.XXX.254 (my ip address)

# of requests per hour

406 07:00
661 08:00
662 09:00
645 10:00
648 11:00
650 12:00
641 13:00
657 14:00
354 15:00

# of duplicate requests — URL

110 POST /wp-admin/admin-ajax.php
2,570 GET /wp-admin/admin-ajax.php?action=blc_current_load

# of requests to base URL

5,141 GET /wp-admin/admin-ajax.php

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Please fix it, if possible. I love the plugin.

http://wordpress.org/extend/plugins/broken-link-checker/