Thank you for your message.
You have to uninstall ShortPoint from all subsites, you do not need that. We recommend to add ShortPoint at the root of the site collection and enable site scope installation.
Please follow these instructions to successfully uninstall ShortPoint from all subsites:
After you uninstall, go to the root site where you have the latest version installed, open ShortPoint Dashboard and click reinstallation and upgrade.
Make sure the dashboard is showing these messages: