Ok… don’t take it so personally. English is not my first language.
What I understood from the “it’s been replaced with the Enriched Editor now” is that he abandoned the first one to develop another. It has a different name after all.
I probably lost it in the translation. Sorry. 
Regarding the WSOD…
This appeared as I wrote before when I tried to edit the permalink. I didn’t add any of the “problematic” text in the already existent first post. I removed half of the text, edited the titled and tried to edit the permalink too that takes the name of the title.
The same text was there that I had copied it from the .doc. to the .txt file and then on the Tiny Editor.
How are these two connected? Why the attempto to change the permalink affected the way that the editor interprets the text?
It doesn’t make sense but that was what actually triggered the WSOD.