I have the same problem with PSE 2018. My printer died and I bought a new one. All apps worked fine with the new printer except PSE which continued to send data to a printer that no longer existed.
Only after resetting my preferences I could print to the new printer. If you have made a lot of changes to your preferences you may want to save the information on screen-copies of the preferences dialog.
These are the steps I completed (caution: this will reset all your preferences settings):
1/ Start PSE and press <alt><shift><ctrl> during startup. You will be prompted if you want to be able to delete your preferences after next startup. You have to say yes.
2/ Restart PSE.
3/ From the menubar select Bearbeiten -> Voreinstellungen... and there Allgemein. You'll get a dialog with a button to delete your preferences file. Press the button.