I guess, after you simulated your model you immediately inspected computational findings without opening a result-file with the extension *.dac. Indeed, FEFLOW allows to look on the results calculated at the last time step only if you go this way. I suggest another workflow. You may write simulated results in a dac-file by pressing on the Record-button in the Simulation toolbar before you start your simulation. When you want to postprocess your data, open the dac-file and browse through the time-steps.