Hi alltogether,
I could solve it by myself. It's quite easy if you look at the commandline reference...
First I tried to find out where these custom buttons are stored inside the psa database.
I easily found them and I also managed to manipulate them by changing the database.
..but be careful...
Hi altogether,
I have some special problem with Plesk Panel. I use version 11.5.30 Update #32 on Ubuntu 10.04.04 LTS 64bits.
In a previous 10.x Version I added a custom-button (and a logo and link) for my own domain name registration service.
(Goto: Tools & Settings -> Panel Appearance ->...