I’m not sure why, but I somehow misread “excluding the asterisks” as “including the asterisks” on the registration email.
So I registered it.
It’s doing better, but still not working.
As a test, I tried a split from a DVD to my hard disk.
When the percentage reaches 100 percent it goes into a wait state and stays there.
After I cancel, the data in the split folders is no good.