Step 1: Open downloaded Cutback installer and proceed with installation.
Step 2: Restart Adobe Premiere Pro and open the project you want to work on.
Step 3: In Premiere Pro, click "Window" > "Extensions" > "Cutback"
Note:
If the [Extension] menu is not activated, try restarting Premiere Pro and opening a project — the menu should appear once a project is loaded.
If you want to download the ZXP file, follow this link to the dashboard and log in.