I just took another look in GT1 and found the steps to sync EWS and DME. It's buried under service functions.
Here were the steps I found it at, there might be a shorter way
Connect GT1
Do usual quick scan
Control Unit Functions button on bottom right
Function Selections button on bottom left
Choose Service > Drive > Electric Car Immobilizer DME then
Test Schedule Button on bottom
Select DME schedule row on bottom section of screen then
click green arrow button on bottom right
Follow the on screen test schedule
