Hi experts,
I'm using SQL Developer 18.4.0.376, my Windows locale is Spain (es) and I've modified file ".\sqldeveloper\sqldeveloper\bin\sqldeveloper.conf" to add this line so the language displayed is english:
AddVMOption -Duser.language=en
I have an export file of an Apex application (UTF8) with this text (with an spanish accent):

When I run it in SQL Developer I get this, in the Script Output window:

And the installed Apex application also has the wrong displayed character.

I've tried several combinations of NLS_LANG environment variable (and after restart SQL Dev) without success.
What am I doing wrong?
Thanks,
Jose.