Note: If you are using an older firmware or using a different device model Home Screen might differ but the procedure is the same.
-> Start your box normally and go into settings
-> Choose the Other tab and go into More Settings
(If you are using an older firmware you might not see the More Settings screen instead directly the next steps)
-> Go into Apps, once your inside Apps, scroll down to Kodi and hit OK
-> Click on Force Stop and clear Data this will also automatically clear the Cache
-> Once that is done you can go back to the Home Screen by pressing Home Button on remote and click on Kodi (XBMC if you are using XBMC)
-> Now to reload the Wookie wizard (as i was using wookie wizard so i will reload it)
-> In order to reload the Wookie wizard we need to go onto the Main Screen and go into System
-> Click on Add-ons from the list, Now click on Install from zip file
-> Once we click on Install from zip file its going to show you a list in the drop down menu
-> Scroll to .Wookie wizard and hit OK
-> Now your going to see Click me option, select it and click OK
-> In a bit, you will see a notification on the bottom right-hand side saying Wookie Add-on is enabled
-> Now we will go back in the main menu of Kodi and select VIDEOS option and click on Add-ons
-> We will select Wookie and if asked we will use our username and password i.e. free and 1234 respectively
-> Once that is done click On Install Wookie then Slect Wookie Lite and hit the red Install Button in the middle of the screen.
-> Now its downloading the Wookie Lite pack
-> Once the process completes wookie lite has been installed on Kodi
-> Re-start your box
-> Go into Kodi and everything will work normally now.
Please remember next time when your done watching a video or a show on XBMC exit it properly using the blue power button on the bottom left-hand side of the screen as the main thing which causes blank screen is not quitting the Kodi app properly.
Here is the video tutorial on above steps:
(The wookie installation screen might differ but i have outlined the steps that you need to follow in the textual instructions above)