Norton Power Eraser hanged

I attempted to use Norton Power Eraser on an old PC on a folder containing about 250 GB of files.
I launched it late in the afternoon and before midnight the processing reached 100%.
At 11 AM it was still running.
Should I presume it hanged?
How can I see the partial results if I stop it?
Is there an approximate formula to predict the time required by Power Eraser based on the size of the folder and the disk type?
Regards