I went through it again from scratch. Platform: Win7. Browser: Chrome.
Clicked on Start Creation, and set some of the fields (characteristics, name, dp)
Clicked on Save Character.
Clicked on Download as Text File; Nothing happened.
Right-clicked on Download as Text File and opened in new tab; it started a fresh character with a random name.
Clicked the Copy button, copied & pasted the text into notepad, saved as Tereza.animaUnico.
Tried to load the text file
Opened a new AnimaUnico tab and tried to load that file. Choose the file to load, but nothing happened. No error message, either.
Selected all and copied the text from notepad into the Carga box, then clicked Carga. Nothing happened. No error message, either.
As far as the copy/paste is concerned, maybe notepad is screwing up the text with carriage returns. I looked at Tereza.animaUnico in cygwin, and there are no surplus carriage returns.
So in the end there is a roundabout way to do it: save to the character server, look at the file on the character server, copy/paste the text from there to a file, and then load it by copy/paste the text from the file to the Carga box.
I hope this helps. I hate to be too critical of free things, and I hope you find this detailed example helpful.