The AppStore is a brilliant feature available to all Trados Studio users and is well integrated into the product making it easy for users to find, download, install, uninstall and update the apps they are using. In the past there was problem however... each user needed to have a licence for Trados Studio in their account. As a student working with Trados Studio courtesy of the University they were not able to access the apps and make use of them. However, we resolved that by creating a private AppStore specifically for University partners where we added apps from the AppStore that were thought to be useful as part of the taught curriculum.
However, with recent events in 2022 we have changed the way the RWS AppStore works and today all students can take advantage of the store available to all users. You can find the instructions for this here: Private AppStore
If you find any problems please follow the troubleshooting steps in that wiki first and if you still can't access then post a question into here Technical Discussions and I'm sure we'll be able to help.