As of this afternoon, the game can be downloaded directly from the master NCsoft launcher without using any third-party workarounds. If you had already downloaded and installed the game, you can feel free to safely shut down and uninstall Pando Media Booster without any impact on your gameplay. Considering the horror stories that have periodically circled around the program, Aion players will likely be happy to learn it's no longer associated with the game.
[Update: NCsoft has contact us to clarify that the removal of Pando Media Booster from Aion is only temporary: "We temporarily removed Pando Media Booster so that we can test a variety of server-side adjustments regarding download completion rates and further refine the service we provide our players. We will bring Pando Media Booster back once we've optimized our service to provide the best download rates possible." Sorry for the confusion!]