Sometimes Visio app crashes on startup.
There are couple of resolutions:
Factory reset:
- Try to open Visio App manually at applications.
 - At Visio's startup screen, press and hold Fidelix-logo over 5 sec.
 - Accept factory reset. NOTE! This removes settings and user data!
 - Run and configurate trough first start -wizard
 
Update / reinstall:
Try to update or reinstall Visio App and Visio Web App.
Manual file remove:
- On the "desktop" or Android applications, open (file) "Explorer"-app
 - Select "Internal memory" -> "Fdx"-folder
 - Press long config.txt and choose "Delete"
 - Restart the device
 - If device asks to select launcher, choose "Visio App" and always
 - Run and configurate trough first start -wizard