Problem With Cache

I am developing locally (xampp) a web service inside a Moodle plug in. 

When i make a change in my code (ex. externallib.php), i must hit the button 'Purge All Cache' (and specifically the 'Language Strings' option) to see the new result.
Otherwise i see the old result.

My 'Cache all language strings' option is also set to 'NO'.

Also i have done everything inside this topic
https://docs.moodle.org/dev/Making_changes_show_up_during_development

Do you have a solution (quick or dirty ;P) to my problem? 

Thank you in advance!!!