I found a little bug.
The settings are stored in the file \PeaZipPortable\App\peazip\res\conf.txt and not in the Data folder.
Solution: Delete this file.
Furthermore the file \PeaZipPortable\App\peazip\res\rnd should be moved to the Data folder, because this file and the conf.txt are changed at the same time.
BTW the file \PeaZipPortable\App\peazip\res\empty.fnd is unnecessary.
Cheers, a new fan.