Thank You for the reply, DrO.
I didn't have planned to create a new account in Winamp Cloud, I just want to login in the old account, which I did in Google Chrome, with and without Winamp 5.7 Beta on the PC (I went online via Facebook also on Frank's PC for a test).
"Sternenmaschinebine" should become a second user on the PC (and not as a different user in Winamp Cloud), if it is really neccessary, although "Sabine Klare" should be the only-one user on my PC, if possible, but the PC-name should stay as "SABINEKLARE-PC". It seems, that I had edited the PC-name successfully, if I look in Control Panel, only the file path for my username-folder is wrong.
The wrong file path in AppData can be seen also here (last night I got the Service Pack 2):
http://www.mediafire.com/download/cm...21.07.2013.txt
If the wrong file path in AppData > Roaming has no influence for my account and my old PC in Winamp Cloud, then I can live with "Sabine Klane" in AppData, although it's not 100% perfect, because I am a perfectionist.