Hi @Vincent_Wood,
Since your desktop environment saves a lot of settings in your home directory that won’t transfer, no matter how much we normies sing, dance and perform, I suggest you:
- Backup all your stuff.
- Download the KDE installation and write it to a thumb drive.
- Use said thumb drive to install a nice, clean KDE.
- Restore your backups and customize the living daylight out of your new KDE installation.
- Profit.
Hope this helps!