Hello, i have a problem, i have make a handling error, so i have save a new project with the same name as an older project… .
Can i recover my older project?
I still have the older “_data”?
It’s possible?
Thank you for your answer, and sorry for my english… 
Audacity projects have a matching AUP file and a _DATA folder. The AUP file is the show manager and tells Audacity how to use the work inside the _DATA folder. Sometimes you can save a damaged simple recording with the recovery tools and without the AUP file.
http://manual.audacityteam.org/o/man/recovery.html
… but if you did editing, production and effects on the show, that’s not going to work.
Koz
If you overwrote the project (the project with the same name was in the same folder as the old project) then you cannot retrieve the old project.
What version of Audacity are you using (look at Help > About Audacity)? Any version of Audacity from the last few years won’t allow you to overwrite another saved project.
Gale
Gale,
My immediate reaction on reading that statement was: oh yes it will! I use v2.0.2 and, when assembling a soundtrack, regularly do File > Save Project. Audacity always overwrites what was previously there, and I do not receive any warning message. Please note: I understand the risks of working this way and accept those risks. So, could you please clarify what you meant by that statement?
PeterA
You are correct there is no prompt with File > Save Project or Save Project As if you are overwriting the same project in the same window.
I meant it won’t allow you to File > Save Project As and choose the name of another, already existing project to save as.
I understood that was the issue in this thread:
save a new project with the same name as an older project
But I’ve changed “a” to “another” to be more clear.
Gale