To update the verse mappings, make changes above, and save them.
Let's look at a sample mapping:
Genesis 31:55 = Genesis 32:1
At the left side of the equation sign is the passage in your Bible. And at the right side is the passage in the Hebrew or Greek Bible.
In other words: Genesis 31:55 in this verse mapping matches with Genesis 32:1 in the original Bible text. If this is the English verse mapping, it means that Genesis 31:55 in Bibles with the English versification system matches with Genesis 32:1 in Hebrew Bibles. The same applies to verse mappings for the New Testament.