How to use iFileX:
If you want to remove for example an application named MyApp.app - you can enter 'myapp' in the name field.
To narrow down the search you can add a new query and set it to 'Creation Date' and set it to 'Within last 1 hour' (Given you installed MyApp.app less then 1 hour ago).
Then click on the search button. iFileX will then search for files which include 'myapp' in the filename and created within 1 hour.
When searching is finished, a new window will popup including all found files.