Lots of apps leave a legacy of activity, clean that shit up!
Open Terminal found in Finder > Applications > Utilities
In Terminal, paste the following: defaults write com.apple.finder AppleShowAllFiles YES.
Press return. If theres no error you are done with the terminal now.
Hold the 'Option/alt' key, then right click on Finder in the dock and click Relaunch.
There is a library directory for the mac itself and your user.
Now check the subfolders for application remains and delete. Here is list of the most common relevantt directories.
~Library > Application Support
~Library > Caches
~Library > Logs
~Library > Preferences
~Library > Containers
~Library > Cookies