Here share the solution to resolve XTOOL EZ400 Pro white screen error after update.
@Mgcinelwa Mokoena asked a question on Facebook:
Hi can anyone help pls I’ve just updated my xtool ez 400 pro bmw software but after updated it can’t load only white screen.
Xtool.co.uk engineer offered the related solution:
Please go to long-press the BMW software icon and click delete (just like you delete APP on your smartphone).
After that, download the software and install it again.
NOTE: NOTE: If the problem still cannot be solved, please contact our customer service center, We will arrange technicians to help you Flash your Xtool File System via TeamViewer
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Email/ Skype: Sales@XTOOL.co.uk