I had to do a fresh install of Kubuntu on upgrading to 20.04. But I managed to keep the home directory including all the files in ~/.config/Duplicati
Now I have installed Duplicati, how do I get it to use the old configuration rather than starting again from scratch?
If you saved the ~/.config/Duplicati folder it should be a simple process. Just make sure Duplicati isn’t running, then copy the files to the same location on your fresh install, and start Duplicati again. It should have the same configuration as your old system after doing that.