chrome portable -- update kills flash cookies

Updating Portable-Chrome from 24 to 25 killed my Flash "cookies". I would like to retain them.

My upgrade process was simply to install PortableChrome 25 into the same folder 24 had been. I made a backup of the old 24 folder, first.

Is there a way to restore those Flash cookies?

Is there a better way to upgrade so that, next time, I don't lose them in the first place?

Thanks in advance.