After uninstalling SQL Prompt, SQL Server Management Studio can run more slowly than before. This may occur if SQL Server Management Studio attempts to load the add-in after it has been uninstalled.

To resolve this problem:

1. Close SQL Server Management Studio.
2. Open Registry Editor (regedit.exe).
3. Navigate to the following registry key (where version is the SQL Server version): HKEY_CURRENT_USER\Software\Microsoft\Microsoft SQL Server\<version>\Tools\Shell\PreloadAddinState
4. Delete the RedGate.SQLPrompt.SSMSUI registry value.
5. Close Registry Editor.
6. Open a Command Prompt window and run SqlWb.exe /setup (SQL Server Management Studio 2005) or SSMS.exe /setup (SQL Server Management Studio 2008, 2008 R2 and 2012) to re-initialize SQL Server Management Studio's interface.