Just updated from from kde4 to plasma via Fedora 21 to Fedora 22. klipper lost all settings. It should have at least migrated the synchronize clipboard/selection and history size options. Reproducible: Didn't try Steps to Reproduce: 1. Upgrade from kde4 to plasma 5 2. Login
Thank you for the bug report. As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists. If this bug is no longer persisting or relevant please change the status to resolved.
This is no longer relevant since KDE4 is long dead. :)