Compare Changes in S/L/E before and after Update
At the start, the current contents of S / L / E is loaded into the right list. The list will be stored.
This list is then loaded when you next start in the left list and the current contents of S / L / E again to the right list.
Then left list with the right list is compared with 'Compare'.
Verification based on the change date.
So run once before the update and then again after the update.