Follow these steps to ensure there are no conflicts with legacy Adobe software (specifically the now deprecated Extension Manager).
Uninstall all versions of Extension Manager
Remove Wipster extension from Adobe "Add-On" page
Wait for Creative Cloud App to update current Add-Ons
Install (reactivate) Wipster extension from Adobe Add-Ons page found here
Wait for notification to install
Open CC2020 and like magic it's there
Still having issues?
You can download the file manually by clicking the link below. You'll be prompted for your email address, and you will receive emails every time you need to download the new version - note that this way requires maintenance and for you to continue to update the panel.