If S-map soils in an analysis have been modified (using user defined soils), you can reset them back to S-Map defaults by clicking on the name of the block you want to reset:
Then clicking to reset to S-map defaults:
Alternatively, if you wish to reset the soils for ALL blocks, this can be done by clicking on the button at the top of the Soils section.
Please note - there is NO "undo" function, so if this is done in error, you will need to go back and redefine soils manually for each block.