Step 1: Run Duplicate File Cleaner and click Basic Tab.

Step 2: Select Drives or Directories according to your need.

Step 3: Select Custom file types on the right side of the interface and click SET to choose which specific file type you are going to find and then click Scan Now.

You can click Add Type to fill in your custom file tpyes and Delete Tpyes to cancle other file types in the form.

Step 4: Select File Deletion Options according to your need, then click Delete.