Windows
Delete the following folders:
C:\Users\{User Name}\Program Files(x86)\Common Files\Adobe\CEP\extensions\com.cutback.cep
C:\Users\{User Name}\Program Files\Common Files\Adobe\CEP\extensions\com.cutback.cep
C:\Users\{User Name}\AppData\Local\Temp\cep_cache\
All folders that contain com.cutback.cep
The AppData folder is usually hidden, so you can access it by directly typing it in the address bar of the explorer, or by entering the path %appdata% in the explorer and pressing enter, then moving to the parent folder
Mac
Delete the following folders
/Library/Application Support/Adobe/CEP/extensions/com.cutback.cep
~/Library/Application Support/Adobe/CEP/extensions/com.cutback.cep
~/Library/Caches/CSXS/cep_cache/
All folders that contain com.cutback.cep
If installed using ZXP file through Extension Manager: Run Extension Manager, select [Premiere Pro] > select com.cutback.cep > click [Remove] to uninstall.