Step 1: Add M4V files
1). Load files by clicking 'Add...'.
2). Directly drag and drop files to the left main window.
3). Right click on the left main window, click 'Add files'.

Step 2: Preset the output effect
Click 'drop-download' list at the bottom to select output format for your M4P files. You may customize the output settings for AAC files. Choose an output format from 'Convert to'. Click the 'Settings' button for detailed settings of 'Bit Rate, Sample Rate, Encoder, Channel' to make your output with high quality.
Step 3: Remove DRM from M4V
Once you've finished all the settings, click 'Start' button to beginning your conversion. After conversion, you can click the 'Find Target' button to open the output folder and find the converted files.

Read Guide: How to Remove DRM Protection from M4P?