Head over to Adobe Exchange and download the latest version of the Wipster Review Panel, the same version will work for both After Effects and Premiere Pro. If you're having trouble, check out Adobe's troubleshoot or try out our troubleshoot.
If you download the Panel via Adobe Exchange it will automatically update when a new version is released.
If you don't want to download the Panel through the Adobe Exchange, you can manually install it using the ZXP file (link below). Note that downloading the file manually requires maintenance and for you to continue to update the Panel.
You'll also need to grab the latest version of the ZXP installer too.
ZXP file for manual download of Wipster Review Panel v3.0.1 (Jan 2019):