Ok then DrumsUI modified your eq2.ini file which is normal and fine.
eq2.ini is located in your EverQuest II folder and can be opened with notepad. You can either remove the entry for DrumsUI or you can change it to EQ2MAPS. What ever name is on that line where DrumsUI is currently is what EQ2MAP will use to install or if the entire line is removed EQ2MAP will make one for it self.