You can use DxO OpticsPro on JPEG images straight from the camera to get the benefit of its lens corrections, but you only see its full power with raw files.
... dxo-opticspro/supported-cameras. *Fuji-X series camera are currently not supported. *mRAW and sRAW specific format are currently not supported. One-click ...
The S5 is supported in OP up to version 11. Check supported gear and you'll find the statement, which is highlighted in the lower rh part of this screenshot.