Step 1: Clilck 'Add...' button to add wma files on the hard disk. You can import one or more files, batch conversion supported. A preview screen is prepared for you to watch loaded videos one by one.

Step 2: You should set the output format from 'Video files to' or 'Audio files to' drop-down list. You can keep the original format or select a new format as output format like AAC, MP3, OGG, etc.
Click 'Browse...' button to select a folder on hard disk to save the converted videos.
Step 3: Click 'Start' button and the WMA DRM Remover will automatically work to remove and convert. Under 'Conversion Progress', you can learn about the conversion status by a blue bar which shows the conversion progress.
If you want to remove drm protection, this WMA DRM Removal is your best choice. If can remove drm from WMA, also support WMV, M4V, M4P, AAC, MP3, etc.

Read Guide: How to Remove DRM Protection from Music?