Uninstalling endnote and removing from word mac

Hi Jason, I have use free 30 day version of endnote to add references to my word document in mac. now the free version is expired and I cannot buy it to activate again. so i have deleted endnote from application folder. now when ever i have to use that word file repeated message comes “Could not find a copy of “EndNote X8” to launch.” I cannot work in my word file because of this message, as it comes every other second, also i cannot delete the references from the word file. Please tell me if you have any solution for this problem. Thanks.