Error Removing plugin on Prod Site

After testing and the image download worked on my test site of 3.1.5 by removing the plugin and reinstalling i went to remove the plugin from my prod site and do the same thing but got an error when uninstalling the plugin.

I went to the reset tab on the plugin and clicked to uninstall.  When i did that i got the following error “Fatal error: Call to a member function flush_rules() on a non-object in /home/content/06/9217206/html/wp-content/plugins/image-store/admin/install.php on line 659”

Is this a problem?  I still went ahead and then deleted the plugin from the plugins page and selected to remove all files, then reinstalled and it appears to have re installed.  I am just worried this may have done something to my database?  I had done this many times in the past to completely wipe out the plugin and never had a problem.

I this is bad i have a db and site backup that i can restore if i have to that i took before i removed this.

Thanks,