Hier die Anleitung:
1. Close Altium Designer.
2. Open Windows Explorer, and make sure that it is set up to display
hidden files and folders.
Navigate to the folder below, and rename it:
• On Windows XP:
C:\Documents and Settings\<username>\Application
Data\AltiumDesigner<version>
(Note: In this folder are the backup of the auto backup feature, so If
you use it save your backup before deleting this folder).
C:\Documents and Settings\<username>\Local Settings\Application
Data\AltiumDesigner<version> C:\Documents and Settings\All
Users\Application Data\AltiumDesigner<version>
• On Windows Vista and Windows 7:
C:\Users\<username>\AppData\Local\AltiumDesigner<version> and
C:\Users\<username>\AppData\Roaming\AltiumDesigner<version>
3. Finally, it is necessary to delete settings from the registry.
This should not be attempted
by inexperienced users - if necessary, IT staff should be asked
for help.
4. Open Altium Designer. This will regenerate the default
configuration files.
Notes:
It is recommended and good practice to save your registry file before
editing it. This can be done in the registry editor as follows by
right-clicking on the key and selecting "File » Export"
a.) Open the registry Editor by opening: "Start » Run", then type:
regedit
b.) Delete/rename the key
HKEY_CURRENT_USER\Software\AltiumDesigner<version>