Method 1:
Shift-C
Doubble-click the name of the chat window you want to open.
Type
/apanel
Click "Restore Hotbars and minibar"
Method 2:
Shift-C
Doubble-click the name of the chat window you want to open.
Type
/AOU_mod\AriensGUI\Scripts\MenuOn.aa
Method 3:
Ctrl-Shift-F7
Scroll down to cc_control_center
Click on it
Ctrl-7
Click the name of the chat window you want to open.
Type
/apanel
Click "Restore Hotbars and minibar"
Method 4:
Shift-C
Doubble-click the name of the chat window you want to open.
Type
/option cc_control_center 1
/option cc_section1 1
/option shortcutbar_window 1
/option friends_window 1
/open "Default Window"
Solved

even after you are loged off.
Kind Regards
Ariensky
PS. I am currently working on a new version, where it automatically will restore after 60 seconds (and only in the "Tips on how to restore chat-windows" have the "permanent" one)