Short birkat hamazon

I have been reciting this shortened version for sometime now, but a while ago I noticed that the version found in in the app is seemingly missing a line ("'Val sh’hotzeitanu m’eretz mitzrayim") from Rav Abadi’s teshuvah version.

Is mentioning the Exodus required in benching? What if one forgets it? If so, is there anyway to update the app to include the line?

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