Hi,
It works fine now.
The funny thing is, what happen to unable it's use?
it started after I choose a notification sound (by mistake), which was a 3,1mb mp3 file.
After several attempts to access the sound app, I change the file location, after what, It open the app.
Thank you for the help.
#alexdon, never found out where I could clear data... Probably not looking in the right place...!
#uliwooly no thirdparty launcher was used.