SI unit to MKS unit (after finish modeling)

Hello,

I have a question regarding unit change.

The problems is,,

I already set all the staad files with SI unit (AISC ASD 89 code).

But my customer(reviewer) requested to change the SI unit to MKs unit (kg, m..etc) .

Is ther any easy way to change all the unit without input load again?

please share your opinion for this problem,

Best reagrds,