Method 1: Launch from Fancycleaner, open Fancycleaner and slide to the 2nd page "Advanced" to launch GalleryVault. Click to download "FancyCleaner"
Method 2: Launch from Browser, visit http://open.thinkyeah.com/gv in the built-in browser.
Method 3: Launch by Manage Space Button, go to the APP info page (Setting>>Apps>>GalleryVault) to tap Manage Space button. (Android 9.0 user should tap clear storage button.)
Attention: 1. Sometimes after GalleryVault is killed by system or other apps, it may not be able to respond. 2. In some device, there is no Manage Space button.