The first thing you need to do is open Control Panel on your computer and under Tools select Folder Options and in the View tab check Show Hidden... and click apply.  Now you can hunt down all the DAZ related files and folders.  There may be some in the two Program Files folders and there Common folders.  ProgramData (which was a hidden folder) often has some.  Then there are a bunch in Users/[user name]/Documents/...;  Users/[user name]/AppData/Roaming/...:  and  Users/Public/Documents/...

Once you think you found and deleted all that you should run a regristry cleaner before re-installing.

DIM is a great program if you take the time to set up you preferences (click the little gear icon).