You have deleted the clip angle from the Connection Vault not the Tool Palette. All the information for the clip Angle still remains, however the icon is missing.
You will have to replace the ConnectionVaultData and the ConnectionVaultData_User xml files.
The location is C :> ProgramData>Graitec>Advance Steel>2014>Steel >Support> Toolbars.
Remember to navigate to the year of AS you are using.
Send a Request to: Support.firstname.lastname@example.org
I hope this helps